Answer:
Step-by-step explanation:
Final kinetic energy is equal to gravitational potential energy
KE=PE
(mv^2)/2=mgh
v^2=2gh
Given h=7m and g=9.8m/s^2
v^2=2(9.8)7
v^2=137.2 m^2\s^2
v=11.7 m/s
They rounded to 11.8 m/s for whatever reason :)
140 m/s
the number = 8/5 or 1 3/5 or 1.6
n = the number
5/2n - 11 = 4
5/2n - 11 + 11 = 5 / 2n
5/2n = 4
5/2n / 5/2 = n
4 / 5/2 = 8/5
a.17.5
275
y=-4x-8
use the equation y-y1=m(x-x1) and solve for y
