Connie

My sister was withdrawn from K12 a month before the school year ended for barely failing grades (she was actually a bit behind). I was wondering does this equal expulsion or not? We are enrolling her for another school and they are asking if she has ever been suspended or expelled and I don't want to give the wrong info.

Ok so I had sex with a guy I've been dating for 5 months 3 times now. The first time was October 31 and I was on my period. I was also a virgin till then. He only went all the way in once cause it hurt too much, we weren't in a comfortable place, and there was a lot of blood so we agree to just stop. He didn't come even close to ejaculating.

The second time was at his house on November 5 and we seriously went at it for an hour, but he never came again. We used a condom at first but it broke after like 10 minutes. At first I thought I was good but then I read precum can make you pregnant, so I to a PLAN B pill just to be safe cause we were at it so long. I took it 50 hours after, November 7th.

So I didn't have any side effects from PLAN B except after a few day, on November 10, I got a brownish discharge and like 3 days of bleeding followed, just like my period usually is, but a little lighter. Other than that nothing.

On November 20 we had sex again, this time he did ejaculate after like 3 minutes, but not inside me. We weren't using Any protection at that time but he assured me that I can't get pregnant since he pulled out in time and I thought so too.

BUT HERE IS MY WORRY. I just noticed yesterday, (November 25) that my aerolas are a lot darker and even my nipples darkened a little. Also my breasts are slightly swollen on the tops and sides. They don't hurt unless I push on them. Also, my vulva is a little darker too. Could I be pregnant or late PLAN B symptom???

This is for a study guide due in the morning, please help me?

Please help me with these... They seem simple but I can't find an answer that seems right? Please help, I'll vote best answer to whoever is right.

The number of students at a school increases at a rate proportional to its current size. In 2005, the school had 1700 students. In 2009, the school had 1850 students. Answer the following.

1) Write a differential equation that models this situation. Let P represent the student population and let t represent the number of years since 2005.

2) Solve for the general solution.

3) Solve for the particular solution in terms of P and t (find the values of all constants).

4) Determine what year the school’s population will reach 2100.

5) Determine the rate at which the population is increasing in 2010. Include units in your answer.

Please help me with these... They seem simple but I can't find an answer that seems right? Please help, I'll vote best answer to whoever is right.

The number of students at a school increases at a rate proportional to its current size. In 2005, the school had 1700 students. In 2009, the school had 1850 students. Answer the following.

1) Write a differential equation that models this situation. Let P represent the student population and let t represent the number of years since 2005.

2) Solve for the general solution.

3) Solve for the particular solution in terms of P and t (find the values of all constants).

4) Determine what year the school’s population will reach 2100.

5) Determine the rate at which the population is increasing in 2010. Include units in your answer.

Please help! I'll vote best answer to the correct answer!!

1. Find the area bounded by the curves y = x^2 and y = √x.

2) There are two regions bounded by the line y = x and the curve y = x^3, one in the first quadrant and another in the third quadrant. Find the total area of these two regions.

3) Find the area bounded by the parabola x = 9 – (y – 2)^2 and the y-axis.

4) A region is bounded by the line x = −1, the line y = 2, and the curve y = 2^x. Find the area of the region

5) 5) A region is bounded in the first quadrant by the curve y = √x-1, the line y = 8 – x, and the x- and

y-axes. Find the area of the region.

I missed the classes for these, due to personal problems, and I have no idea what to do with these. Please help? (It would be awesome if you could explain how you got your answer as well)

I listed the bounds as (top, bottom) Thank you so much!

1. Approximate ∫(1, -1) (3+x-x^2)dx with a left-endpoint Riemann sum using four equal subintervals.

2. Approximate ∫(1,0) tan (theta)d(theta) with a right-endpoint Riemann sum using four equal subintervals.

3. Approximate ∫(4,1) ln (y+1)dy with a midpoint Riemann sum using three equal subintervals.

4) Approximate ∫(2,-1) (3^z+1)dz with three trapezoids of equal width.

5. Approximate ∫(2,0) l x^2-1 l dx with a right-endpoint Riemann sum using four equal subintervals

Please help!

1. Evaluate

3

∫ 2x+1/x dx. State your answer as an exact value (not a rounded decimal).

1

2. Evaluate

0

∫ (10^-x)dx. State your answer as an exact value (not a rounded decimal).

-2

3. Evaluate

pi/2

∫ cos x * sin^2 x dx. State your answer as an exact value (not a rounded decimal).

0

4. Evaluate

1/2

∫ 1/√(1-x^2) dx. State your answer as an exact value (not a rounded decimal).

-1/2

5. Evaluate

3

∫ (3x-1)^5/3 dx. State your answer as an exact value (not a rounded decimal).

0

I'm stuck on these two questions can someone help? I'll vote best answer for the correct one!

4) Suppose the velocity of an object is v(t) = 9t – t^3, where v(t) is measured in feet per minute. Find the displacement of the object for the interval 0 <= t <= 5.

5) Refer to the information in Problem 4. Find the distance traveled by the object for the interval 0 <= t <= 5.

PLEASE help me with my finals study guide I'll give you 10 points for correct answers!

Also please note that the < signs are actually less than OR EQUAL signs but I couldn't post them right with my keyboard.

1) An object moves from a point of origin 5 meters to the left. Describe the object’s displacement and total distance traveled.

2) Suppose the vertical position of an object is y(t) = 32t – 8t^2, where y(t) is measured in centimeters.

Find the displacement of the object for the interval 0 < t < 3.

3) Refer to the information in Problem 2. Find the distance traveled by the object for the interval 0 < t < 3

4) Suppose the velocity of an object is v(t) = 9t – t^3, where v(t) is measured in feet per minute. Find the displacement of the object for the interval 0 < t < 5.

5) Refer to the information in Problem 4. Find the distance traveled by the object for the interval 0 < t < 5

1) Find the average value of the function f (x) = 3 – 4x + 5x^2 over the interval [−1, 3]

2) Find the average value of the function g(x) = In x / x over the interval [1, e].

3) Find the average value of the function y(x) = 4 sec^2 x over the interval [0, π/3].

4) The area under the curve defined by the positive function f (x) on the interval [2, 6] is known to be 34. What is the average value of f (x) over the interval [2, 6]?

5) The function g(x) is always negative and has an average value of −12 over the interval 0 ≤ x ≤ 5. Find the area between the curve y = g(x) and the x-axis on the interval [0, 5].

Not sure about these questions from my study guide, please help or check my answers. I'll give you 10 points if they are right!

1. A pump is used to fill an inflatable mattress at a constant rate of 0.25 cubic feet per second. If the

mattress is completely inflated after 1 minute, how much air can the mattress hold? Include units in your answer.

(Well I think the answer to this is that the mattress can hold 15 cubic feet is that right?)

2) The same mattress in Problem 1 is later deflated by opening its release valve. Air escapes at a rate of r(t) = 0.25e^−0.05t, where r is in cubic feet per second. Assuming the mattress is still completely inflated when the valve is opened, how much air is released in the first 30 seconds?

3) Refer to the information in Problems 1 and 2. How much air remains in the mattress after 45 seconds from opening the release valve?

4) A projectile travels at a velocity of v(t) = 45 – 32t, where v(t) is measured in feet per second. Find the change in position (displacement) of the projectile on the time interval [0, 3]. Include units in your answer.

5) Refer to the scenario in Problem 4. If the projectile started with an initial position at s(0) = 25 feet, find its position at t = 3.

I am doing a study guide for The Lord of the Flies and I am unsure of these questions. Please help? < means I think it is the answer or maybe the answer and X means I know it's not the answer for sure.

3. Which word describes Simon best?

A. weak < (? maybe)

B. victorious

C. individualistic <

D. ignorant X

5. In what sense is the ending of the novel ironic?

A. The rescue occurred because the boys burned the island. < (?)

B. The boys had thought that rescue was impossible.X

C. Ralph had tried his best to attract a rescue.X

D. The boys were rescued by an adult, a naval officer.< (maybe)

6. Why was the fragility of civilization a major issue when William Golding wrote Lord of the Flies?

Protests against the British Empire were widespread during the 1950s.

William Golding had been a hero during World War II.

Lord of the Flies was the first novel to show violence realistically.

After War II, people were afraid of still worse wars to come. <

7. The beast is not something you can kill, the Lord of the Flies tells Simon. What can readers infer from that?

A. It is not possible for human beings to understand the beast.

B. The pig's head is not really speaking to Simon.

C. The beast is just a horror story that the boys made up to scare themselves.

D. The beast stands for the senseless violence in all human beings.<

I have a 25 questions study guide to do! I figured out 20 of them (At least I think I did) but I have 5 left that I can't figure out! Someone please help?

13. What is the [H+] of a solution with a pH of 6.6? Use a scientific calculator.

2.5 × 10^-7

5.0 × 10^-5

8.3 × 10^-6

7.7 × 10^-5

18. A solution of baking soda and water has a pH of 8.40. What type of solution is this?

acidic

basic

neutral << (This one?)

20. Pyridine is a weak base with the formula C5H5N. Pyridine reacts with water according to the following equation: C5H5N + H2O C5H5NH+ + OH. What is the formula for the dissociation constant for this base?

Kb = [H+][CO2Hundefined]/[C5H5N]

Kb = [OH][C5H5NH+]/[C5H5N]

Kb = [C5H5N]/[OH][CO2H]

Kb = [C5H5N][CO2H]/[OH]

21. Formic acid (HCO2H) has a dissociation constant of 1.8 × 104 M. The acid dissociates 1:1. What is the [H+] if 0.1 mole of formic acid is dissolved in 1.0 liter of water? Use a scientific calculator.

(Points : 3)

0.9 × 10^-3 M

4.2 × 10^-3 M

7.9 × 10^-3 M

15 × 10^-4 M

25. What is the pH of an acid with a [H+] of 1.0 × 104 M?

1

4

7

10

I did all the questions except for these two! There are 30 questions in my study guide! Please help!

19. A solution must be at a higher temperature than a pure solvent to boil. What colligative property can be employed to achieve this?

vapor-pressure lowering

boiling-point elevation <<<<< (This one?)

freezing-point depression X (I know it's NOT this one)

21. A gas mixture contains 88 grams of oxygen gas, 88 grams of nitrogen gas, and 12 grams of nitrogen dioxide gas. What is the mole fraction of nitrogen dioxide in this mixture?

(I have no idea on this one :(

0.04

0.12

0.45

0.51

22. In the gas mixture containing 88 grams of oxygen gas, 88 grams of nitrogen gas, and 12 grams of nitrogen dioxide gas, what is the mole fraction of nitrogen gas?

0.12

0.45

0.81

0.51

23. Which of the following actions will not increase the rate at which a solid dissolves in a liquid?

stirring the solid and the liquid

increasing the amount of the solid

increasing the surface area of the solid

lowering the temperature of the system <<< (This one??)

24. Which term describes the amount of solute that will dissolve in a specific solvent under given conditions?

molality

solubility <<< (This one?)

solution

molarity

What should the mole fractions in a solution add up to?

1 (Right????)

Acceleration due to gravity in feet per squared second is the constant function a(t) = −32. Suppose a projectile is launched from a height of 100 feet with an initial velocity of 40 feet per second.

3. Find the velocity function, v(t), for the projectile.

4. Find the vertical position function, y(t), for the projectile.

5. When will the projectile hit the ground?

My teacher doesn't explain lessons the answers I got don't seem right! Please help?

Suppose f'(x) = 12 sqrt 1+4x where f(0) = 5

1. Find the general antiderivative, f (x).

2. Use the initial value to find f (6).

Acceleration due to gravity in feet per squared second is the constant function a(t) = −32. Suppose a projectile is launched from a height of 100 feet with an initial velocity of 40 feet per second.

3. Find the velocity function, v(t), for the projectile.

4. Find the vertical position function, y(t), for the projectile.

5. When will the projectile hit the ground?

I figured out 2/3 of my study guide but I just need help with these questions. :/

These are a couple of questions from my study guide please help me with them? And please show ur work if not too much trouble I have my test on Monday so I want to understand.

6) Evaluate ∫ 3^-x/2 * dx

7) Evaluate ∫ x cos x^2 * dx

There wasn't actually a * before the dx's, I just put them there to prevent confusion. But it was actually only a space. Thank you! There was actually 10 in the study guide but I figured out half of them, I don't know the answers to these though. :/

1) Evaluate ∫ sin(pi x) * dx

3) Evaluate ∫ 1/(4x-5)^2 * dx

4) Evaluate ∫ sec^2 (x/2) * dx

6) Evaluate ∫ 3^-x/2 * dx

7) Evaluate ∫ x cos x^2 * dx

I have 4 questions left on my study guide can anyone help me with them? I just couldn't figure out 4 out of 25 of them.

12. Increasing the total pressure above a liquid raises the boiling point. Which of the following best explains why?

The number of molecules with high kinetic energies is reduced.

The number of molecules with high kinetic energies is increased.

The amount of kinetic energy required for the molecules to break free of the intermolecular forces in the liquid is decreased.

The amount of kinetic energy required for the molecules to break free of the intermolecular forces in the liquid is raised.

20. A reaction requires 22.4 L of gas at STP. You have 25.0 L of gas at 101.5 kPa and 373 K. Which of the following statements is true? (Use the ideal gas law: PV = nRT where R = 8.31 L-kPa/mol-K.)

(Points : 3)

You will have excess gas for the reaction.

You will have enough gas for the reaction.

You do not have enough gas for the reaction.

Given this information, you cannot tell if you have enough gas for the reaction.

21. The pressure of air inside a sealed, rigid, metal can at 100°C is 125 kPa, and the atmospheric pressure is 101.5 kPa. You quickly cool the can to 0°C. Which of the following statements is true?

The pressure inside the can stays the same.

The pressure inside the can will decrease, and the can will be crushed by the atmospheric pressure.

The pressure inside the can will increase, and the can will push out.

The pressure inside will decrease, but the can will not be crushed by the atmospheric pressure.

25. The partial pressure of oxygen at 310 K in one lung (6.0 L) is 21.3 kPa. How many moles of oxygen are in that lung? (Use the ideal gas law: PV = nRT where R = 8.31 L-kPa/mol-K.)

0.025 mol

0.05 mol

0.15 mol

2.00 mol

Thank you!