The 8th term in the Fibonacci
sequence is 21. The 10th term is 55.
What is the 9th term?
(Need answer ASAP)

Someone answer asap for ! a ball is rolled down a ramp. the height, f(x), in meters, of the ball x seconds after it is released is modeled by the function f(x) = x²- 10x + 25 for all values of x from 0 to 5. which statement about the ball is true? a. the maximum height of the ball is 5 meters b. the height of the ball increases from 0 to 5 meters above the ground. c. the ball has traveled 5 meters when it reaches the bottom of the ramp. d. the ball has been traveling for 5 seconds when it reaches the bottom of the ramp

What is the simplified form of square root of 400 to the 100th power ?

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation