A stuntman jumping off a 20-m-high building is modeled by the equation h = 20 – 5t2, where t is the time in seconds. A high-speed camera is ready to film him between 15 m and 10 m above the ground. For which interval of time should the camera film him?
Answer:

Step-by-step explanation:
Given:
A stuntman jumping off a 20-m-high building is modeled by the equation
-----------(1)
A high-speed camera is ready to making film between 15 m and 10 m above the ground
when the stuntman is 15m above the ground.
height
Put height value in equation 1





We know that the time is always positive, therefore 
when the stuntman is 10m above the ground.
height
Put height value in equation 1







Therefore ,time interval of camera film him is 
Angle=28.1416
Rounded=28
hope this helps
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Answer:
4(2x+7) which is equal to 8x+28
Answer:
y = 5 -
73/8 = -0.443 or y = 5 +
73/8 = 1.693
Step-by-step explanation:
step 1: Equation
step 2: Trying to factor by splitting the middle term