A rocket is projected directly upward with an initial velocity of 352 ft/sec from the ground. After t seconds, it's height in feet is given by f(t) = -16t^2 + 352t. After how many seconds will it be 640 feet above the ground?

Jane moves from a house with 71 square feet of closet space to an apartment with 45.44 square feet of closet space. what is the percentage decrease of jane’s closet space?

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! )

Mia’s gross pay is 2953 her deductions total 724.15 what percent if her gross pay is take-home pay