Jupe

Pushing the jump button twice doesn't seem to be working..

I am having a hard time finding information about who first discovered the Brachiopods.. I have looked all over the internet and nothing.. Any help would be great!! Thank you!

If you find granite, what does that tell you about the past environment?

An efficiency study of the morning shift at a certain factory indicates that an average worker who arrives on the job at 8:00 a.m. will have assembled

U(t)=-0.3t^3+0.5t^2+205te^t

units t hours later.

a) Find an expression for the rate at which the worker will be assembling the units t hours after 8:00 a.m.

b) Use the result obtained in part (a) to determine the rate at which the worker will be assembling units at 11:00a.m.

c) Estimate the number of units the worker will actually assemble between 9:00 to 10:00.

Please help!!

An efficiency study of the morning shift at a certain factory indicates that an average worker who arrives on the job at 8:00 a.m. will have assembled

U(t)=-0.3t^3+0.5t^2+205te^t

units t hours later.

a) Find an experecaion for the rate at which the worker will be assembling the units t hours after 8:00 a.m.

b) Use the result obtained in part (a) to determine the rate at which the worker will be assembling units at 11:00a.m.

c) Estimate the number of units the worker will actually assemble between 9:00 to 10:00.

Suppose you are standing at the top of a 200 m cliff and fire a cannonball directly upward with an initial velocity of 150 m/sec. Neglect air resistance..

When will the cannonball hit the ground? (the bottom of the cliff)

I used the height formula and got 200+150t-4.905t^2

I then used the Quadratic formula and got: t=248.67 or t=-548.67

So, am I right when I say the cannonball hit the ground at 248.67 seconds?

You are given a colored solution that is labeled 1M. You need to prepare a solution from this that is 0.5M. How would you do this?

It is not possible to observe the n7-->n2 transition in the Balmer series. Why do you think this is?

Find the derivative

f(x) = e^x^x

These derivatives confuse me....

Thanks!

Calculate the derivative with respect to x

tan(x^(2)y) = (x+y)^3

This is blowing up my brain...

Thank you!!

Find the equation of the tangent line at the given point:

x^2e^y + ye^x = 4, (2,0)

Thank you!!

Yeah, so what is your sign and what do think is your best and worst quality?

Here is the limit definition: f'(x)=lim f(x+h)-f(x)/h

h->0

Solve using the limit definition: 1/2x+3

Thank you!!

0=324-4.905t^2

t=(+)(-)8.127

How do you get that? Would I use the Quadratic formula? And if so A would be 324, B would be -4.905 but what would C be?

Thanks!!

Imagine you are standing at the edge of a cliff. You throw a rock directly upward. It is observed that 2 seconds later the rock is at the maximum height (in meters) and 5 seconds after that (that is, 5 seconds after the rock reaches maximum height or 7 seconds after you first threw the rock), it hits the ground at the base of the cliff.

a) What is the initial velocity of the rock?

I got 19.62 m/s

b) How high is the cliff?

I am not sure about this one. I do know to use h(t)=ho-1/2gt^2..

c)What is the velocity of the rock at time (t)? In other words, find the velocity of the rock as a fucntion of time.

d)With what velocity does the rock hit the ground?

I'm having serious issues with B, C and D... Thanks for any help I could get..

It gives the graph of f(x) = 3x+5/1+x

a) Find the equation of the tangent line to the graph of f(x) at the indicated point (1,4)

b) Find an equation of the line that is perpendicular to the tangent line to the graph of f at the indicated point (1,4)..

I know, I should know how to do this but it seems like so long ago that we did this stuff..

Any help would be great.. Thanks!!

Let f(x)=xe^x

Find f ' (x) = e^x(x+1)

Find f ''(x) = e^x(x+2)

Find f '''(x) = e^x(x+3)

Now this is where I get stuck...

Find f^(1000)(x)

Would it just be f^(1000)(x) = e^x(x+1000)? I mean it seems like it would be...

For the following chemical reaction

HCN(aq)+KOH(aq)----->H2O(l)+KCN(aq)

write the net ionic equation, incliding phases..

Thank you!!

If a solution containing 55.761 g of Mercury (II) acetate is allowed to react completely with a solution containing 15.488 g of Sodium Sulfate, how any grams of solid preticipate will be formed?

How many grams of the reactant in excess will remain after the reaction?

This is boggling my brain!! Thank you!!

78.0 mL of a 1.60 M solution is diluted to a total volume of 288 mL. A 144 mL portion of that solution is diluted by adding 181 mL of water. What is the final concentration? Assume the volumes are additive..

This is killing me!!