1. A ball is thrown upwards with a velocity of 32 ft/sec from the top of a building. The height of the ball, s, in feet can be modeled by s(t) = -16(t + 3) (t-5) or s(t) = -16(t - 1)^2 or s(t) = -16t^2 + 32t + 240 where t is greater than or equal to zero in seconds.
a. Write the form that is most useful when finding the maximum height of the ball.
s(t) = __
b. What is the max height of the ball? ___ When did it occur? ___
c. Write the form that is most useful when finding the time the ball was in the air.
s(t) = __
d. How long was the ball in the air?
e. What is the height of the building?

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google

there is no grid

step-by-step explanation:

answer: a. 13/44

step-by-step explanation: judging by the information given to us, we are looking for experimental probability. we can see that 13 males have chosen chocolate ice cream. there are 44 ice creams in total (remember that the total is always the denominator). so our answer is 13/44.

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft