Ryan

Determine an equation that models the time of sunset in saskatoon over 720 days.Justify your answer.

b. State the range of the function.

http://www.flickr.com/photos/40344572@N04/74540310...

Andrew would like to withdraw $500 per month from a retirement fund for 15 years after he retires.?

If he can earn 10 % interest compounded monthly on this fund, how much will he need to have in this account when he retires?

PV = 500[1-(1+.1)^-180]/.1

=207235.17

Some people like to retirement at the age of 65. Compare the amount at age 65 that would result from making an annual deposit of $1000 starting at the age of 20, or from making an annual deposit of $3000 starting at the age of 50, to an RRSP that earns 6% interest per annum, compound annually.

What are the totals of deposits in each situation??

What are the final amount for both situations and state which one is more profitable?

Should I use this formula A=R[(1+i)^n-1]/i

A rocket carrying a weather satellite is launched. As it moves through space, the rocket is tracked by two tracking stations located 24 km apart, beneath the rocket. The two tracking stations both lie west of the launching pad and are located on a straight line from the launching pad. At a specific moment, the rocket's angle of elevation from stationX is 40 degrees while the rocket's angle of elevation from stationY is 70 degrees. Both tracking stations are west of the rocket at this moment. At this moment, what is the altitude of the rocket, correct to one decimal place?

Olivia designs and sells necklaces. The materials for each necklace cost $4. She sells an average of 40 necklaces a week for$8 each. She would like to raise the price, but for each $0.50 increase she would lose four sales each week.

a) Write an expression to represent the price of each necklace.

b) Write an expression to represent the number of necklaces sold per week.

c) Use your answers in a) and b) to write an expression that represents Olivia's revenue from the sales of her necklaces.

d) Write an expression to represent the cost of the materials for the necklaces

e) Use your answers from c) and d) to write an equation for Olivia's profit.

f) What selling price will give Olivia the largest profit?

g) What will her profit be?

h) How many necklaces must she sell to earn this profit?

Andrew would like to withdraw $500 per month from a retirement fund for 15 years after he retires. If he can earn 10% interest compounded monthly on this fund, how much will he need to have in this account when he retires?

The temperature of a cooling liquid over time can be modelled by exponential function T(x)=60(1/2)^x/30+20, where T is the temperature, in degrees Celsius, and x is the elapsed time, in minutes.

a) Graph the function

b) Determine how long it takes for the temperature to reach 28°C

c) Check the accuracy of your answer

A group of mountain climbers are using trigonometry to find the height of a mountain located in the Rockies. From point A, which is due west of the mountain, the angle of elevation to the top is 56°. From point B, which is due east of the mountain, the angle of elevation to the top is 38°. Points A and B are 9.4 km apart. Determine the height of the mountain and round to the nearest meter.

A triangular a lot sits at the corner of two streets that intersect at an angle of 63°. One street side of the lot is 35 m and the other is 47 m. How long is the back of the lot to the nearest meter?

A cottage under construction is to be 15.6 m wide. The two sides of the roof to be supported by equal rafters that meet at a 52° angle. Determine the length of the rafters to the nearest cm using

a) the cosine law

b) the sine law