Answer:
65 ft (which is A)
Step-by-step explanation:
A² + B² = C²
72² + B² = 97²
B² = 4225
B = √4225
B = 65 ft
144t-16t^2= 16t(9-t)
after 3 seconds (just substitute t=3):
16(3)(9-3)=
16(3)(6)=
16*18=
288
maximum height: find the average of the roots:
the roots of 16t(9-t) are t=0 or t=9
since it's a parabola, the maximum is at t=4.5, at 324 ft
if its height is 224 feet, the equation is 224=144t-16t^2
16t^2-144t+224=0
divide by 16: t^2-9t+14=0
this can be factored as (t-2)(t-7)=0
the roots are t=2 and t=7, so the ball has been in the air for either 2 seconds or 7 seconds
the roots to 144t-16t^2 are 0 and 9, so the ball will hit the ground 9 seconds after being thrown
C
Explanation
I took the test.
Answer:
D
Step-by-step explanation:
I'm pretty sure it's D
(37.5)(12.5)=x(15)
468.75=15x
x=31.25
she will have to work 31.25 hours in order to earn the same amount of money
