Simplify (x − 4)(4x2 + x − 6). question 1 options: a. 4x3 − 16x2 − 10x + 24 b. 4x3 + 15x2 + 10x − 24 c. 4x3 − 15x2 − 10x + 24 d. 4x3 + 16x2 + 10x − 24

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )