100
10,uus
11. a ball is thrown upward at a velocity of 15 meters per second from a height that is 20
meters above the ground. the height h (in meters) of the ball at time t in seconds) after it
is thrown can be found by h(t) = -5t^2 + 15t + 20. find the time when the ball is again 20
meters above the ground.
a
1 second
(b
2 seconds
c
3 seconds
d
4 seconds

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

just take the area of the square and then the area of the circle then subtract the circle area from the squares area

step-by-step explanation:

answer: when you burn wood, the carbon reacts with the oxygen in the air to create ash and smoke. that is a permanent change you cannot undo that.

step-by-step explanation: