Simplify each product. write in standard form. explain

16.
5k(3 - 4k)

18.
6g^2 (g - 8)

20.
-2n^2 (5n - 9 + 4n^2)

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

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)