Answer:
50.27
Step-by-step explanation:
remember that the circumference of a circle is 2πr
so 3.15x8 and then multiply by two
x^2-16 factors to (x-4)(x+4)
You use the difference of squares rule here which is
a^2 - b^2 = (a-b)(a+b)
Your answer should be 9 if you start off with 4
If McKenzie runs 1.5 mp10m, multiply 1.5 by 6. McKenzie runs 9 miles per hour.
