Hint #1: Substitute in 15 for s(t) in the given equation. Hint #2: Use the Quadratic Formula or DESMOS

9)
Dennis the Menace is
shooting a rock with his
slingshot with an initial
height of 5 feet. The height,
in feet, of the rock above
the ground is given by
s(t) = -16t+44t + 5,
where t is time in seconds
and t > 0. At what time
will the rock be 15 feet
above the ground?

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation: