Simplify the product.
4x (2x^3 - 7x^2 + x)

a) 8x^4 - 28x^3 + 4x^2
b) 16x^3 - 7x^2 + x
c) 8x^4 - 7x^2 + x
d) 16x^4 - 3x^3 + 4x^2

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Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

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