Step-by-step explanation:
use cosine rule
c^2 = b^2 + a^2 - 2ab(cos)c
#15)
answer is B. 3
3 friends didn't visit zoo
Given the height of the ball at time, t is modeled by:
h(t)=100t-16t^2
the maximum height will be found as follows:
at maximum height:
h'(t)=0
thus given h(t), the derivative will be:
h'(t)=100-32t=0
solving for t we get
t=100/32
thus the time taken for the ball to reach maximum height is t=100/32. Hence the maximum height will be:
h(100/32)=100×100/32-16×(100/32)²
=156.25 ft
126-27 = 99, hope this helps
