What is the mean of this

15, 16, 15, 13, 19, 20, 21

what is the answer?

A: 15

B: 16

C: 17

D: 18

triangles unit test part 1 a length of rope is streched between the top edge of a building and a stake in the ground. the head of the stake is at ground level.

The length and width of a rectangle are 5 feet and 2 feet respectively A similar rectangle has width of 8 feet. what is the length of the second triangle

Eight tennis players take part in an elimination tournament and are placed at random. The players are ranked 1, 2, ..., 8, so the player ranked 1 is first (best) and the player ranked 8 is last (worst).

Jeremy is 15 years old. His father is 4 times as old as him now. In how many years time will their total age be 115 years?

Bob is having a party and want to order some cake. there will be 57 guest and he wants to make sure that everyone gets a slice of cake. he wants to pay as little as possible for the cakes and for them to be the same size.

1. Andrew deposits $300 into an account that earns 2% interest each year. After the first year, Andrew has $306 in the account. After the second year, Andrew has $312 in the account, and after the third year, Andrew has $318 in the account.

Ryan took out a 66-month loan to pay for a $28,500 car. If he paid $33,829.50 in total at the end of the loan, find the interest rate.

Write and solve an inequality to find the values of x for which the area of the retangle is greater than the area of the triangle

Simplify (-15+78) - |22-83|

Factor f (x) = 2x^3+5x^2-97x+180