Answer:
Step-by-step explanation:
hello :
the cannonball hit the ground when h=0
-5t² + 40t=0 means : -5t(t- 8)=0
t=8
C
9/2
In order to find the slope of a line that is perpendicular to another line, you must find the opposite and reciprocal of that slope. So, you have 2/9, and then 9/2.
27
129-(-1) = 130
130/5 = 26
26+1 = 27
