Please I need help What is the length of AC? Round to the nearest tenth

A. 10.5m

B. 21.4 m

C. 18.3 m

D. 12.3 m

An arrow is shot vertically upward at a rate of 180ft/s. use the projectile formula h=−16t2+v0t to determine at what time(s), in seconds, the arrow is at a height of 420ft. round your answer(s) to the nearest tenth of a second.

What two criteria are needed for triangles to be similar

Me! last question, and i'm stuck! write the algebraic expression that models the word phrase. the product of 2 divided by the number h and 8 more than the number k