Answer:
72.5m/hr
Step-by-step explanation:
Divide 870 by 12 to represent how many miles David drove in 1 hour.

David drove 72.5 miles per hour.
Answer:
B. 4mm
Step-by-step explanation:
A cube is a 3d square, so the length, width, and height are equal. To find the volume you have to times all three of those things. 4^3 or 4 * 4 * 4, is 64.
Step-by-step explanation:
The given expression is :

We need to find the equivalent expression for the above expression.
We can write 3 as 2+1
(This is the equivalent expression)
Also,

This is also an equivalent expression.
Step-by-step explanation:
Simplest form=10/30=1/3
=1cm:3cm
Simplest form=2cm:1m
1m=100cm
2:100
2/100=1/50
1cm:50cm