If t varied jointly with u and the square of v, and t is 1152 when u is 8 and v is 4, find t when v is 5 and u is 2.

Question

If t varied jointly with u and the square of v, and t is 1152 when u is 8 and v is 4, find t when v is 5 and u is 2. 
Answer choices:
A) 144
B) 785
C) 450
D)225

oobleck · Answer

t = kuv^2 So, t/(uv^2) = k, a constant You want t such that t/(2*5^2) = 1152/(8*4^2)

Anonymous · Answer

220