The height of a projectile in feet at time t is determined by the equation h=-16t^2+128t+320. At what time will the projectile b e 560 feet high
2 answers:
Answer:
At 3 seconds and again at 5 seconds
Step-by-step explanation:
h = -16t² + 128t + 320
560 = -16t² + 128t + 320
16t² - 128t + 240 = 0
t² - 8t + 15 = 0
t² - 5t - 3t + 15 = 0
t(t - 5) - 3(t - 5) = 0
(t - 5)(t - 3) = 0
t = 3, t = 5
Answer:
3 seconds and 5 seconds
Step-by-step explanation:
Let the function equal 560 ft
560=-16t^2+128t+320
Subtract 560 from each side
560-560=-16t^2+128t+320-560
0 =-16t^2+128t-240
Divide each side by -16
0/-16 = (-16t^2+128t-240)/-16
0 = t^2 -8t-15
Factor
0=(t-5)(t-3)
Using the zero product property
t-5 =0 t-3=0
t=5 t=3
You might be interested in
It’s -1/2 (negative 1 over 2)
Answer:
B.
Step-by-step explanation:
You have to use the number in the variable to figure out if the number multiplied by 3.5 goes over 20 dollars. The highest you can go without going over 20 dollars is 5 notebooks
Answer:
6
Step-by-step explanation:
Answer:
32
Step-by-step explanation:
(4x6)/2+(2x2)/2+2x2+(2x6)/2
Answer:
I have the same doubt so pls answer
Step-by-step explanation: