Thirty pounds of a salt-water solution contains fifteen percent salt. how much salt is in the water?
1.5 lb
3 lb
4.5 lb

(i came up with 2 answers and i need someone with the same answer, the two options that i came up with is 1.5 lb. or 4.5lb.

Factor k2 - 17k + 16. a.(k - 2)(k - 8) b.(k - 1)(k + 16) c.(k - 1)(k - 16)

Wrote and expression for the difference of p and 4

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! )