Select the phrase from the drop-down menu to correctly complete to the sentence. i assume it would be "c" but i would like to make sure.

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

What is the prime factorization of 230

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)