Answer & Step-by-step explanation:
The circumference is basically the perimeter of a circle. The circumference of a circle is found by multiplying the diameter by π (pi):

or by multiplying the radius (which is half of the diameter) by 2 and π:

Answer:
5^20 • 7^40
Step-by-step explanation:
each exponent needs to multiply each 10.
Answer:
y=2/3x +b
-3=2/3(1)+b
b=-11/3
y=2/3x+(11/3)
y=2/3x-11/3
Step-by-step explanation:
Given the slope and one point on the line we use the formula above.
640×3= 1,920 Then you don't need to estimate it since it's estimated.
hope this helps :-)<span />