Remember that the formula for the circumference, 
, of a circle is:
In this case, we are not given the diameter. However, remember that the diameter is equivalent to two times the radius of a circle. Thus,
,
and we can say the circumference of our circle is:
The circumference of our circle is 50.24 units.
<em>Also, a little side note not relating to the question:</em>
<em>Remember that 
is spelled as "pi" not "pie." Pie is a dessert, while pi is a mathematical constant.</em>
Find the unit rate:
4.5 miles 2
------------- * ------- = 9 mph
0.5 hour 2
Well at first you take the numerator (the top number) and divide it by the denominator (the lower number) that'll give you the whole number. then you would reduce only the fraction. for example lets say that we have 4/8 We know that at the very least since they are both even numbers we can divide by so so if we do that we have 2/4 oh look, even numbers again and divide both sides by two again and you get 1/2.
Answer:
-4
Step-by-step explanation:
Answer: neither
Step-by-step explanation: if you plug in 2 and 4 for x and y it does not equal 8
