Jacob has 96 books to stack on library shelves. each shelf can hold 9 books. how many shelves will he need to stack all the books

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

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)

I’m really confused and need your assist me with this question i’ve never been taught