Answer:
Step-by-step explanation:
That is correct.. (-4)(-1)=4 4(3)=12 12(-2)=-24
Answer:
The height of the cone is 
Step-by-step explanation:
we know that
The volume of a cone is equal to
In this problem we have
----> the radius is half the diameter
assume 
substitute the values and solve for h
Triangle area formula: base*height/2
so, 14*10/2 = 7*10 = 70 sq. in.
The time taken for radio signal to the earth's surface we shall proceed as follows;
time=(distance)/(speed)
Distance=7.5×10^6 meters
speed=3×10^8 meters/second
therefore:
Time=(7.5×10^6)/(3×10^8)=0.025 seconds
We conclude that it will take the signal 0.025 seconds to reach the surface of the earth.
