Answer:
D ) h₁,₂ =[ ( 9 ± √97 ) ]/8
Step-by-step explanation:
The equation of the football is
h = -16t² + 36t +4
What is the time for football to hit the ground
Hit the ground means h = 0 then
-16t² + 36t + 4 = 0
Simplifying by (-4)
4t² - 9t - 1 = 0 a second degree equation
Solving
h₁,₂ =[ ( 9 ± √(81 + 16) ] /8 ⇒ h₁,₂ =[ ( 9 ± √97 ) ]/8
The answer given in D
The greatest common factor of 30 is 3 and 5
So integers are ...-5 -4 -3 -2 -1 0 1 2 3 4 5 6...
The answer would be -13 & 3
A=Pi(r^2)
A=Pi(54.76)
The answer is 54.76 Pi