What is the area of the base of a rectangular prism that has a 9mm width an 8mm height and a 14mm length?

Which expression is equivalent to the expression below? (6c^2 + 3c) / (-4c + 2) / (2c + 1) / (4c - 1)a. 3c(2c-1) / (2c + 1)b. -3c(2c-1)^2 / (2c + 1)^2c. 3cd. -3c(just took the test its d. -3c)

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?