9 The second week of school, Target marked all school supplies down 40%. Ifa binder was on sale for $2.39, what was the original price of the binder? A. $3.98
B. $5.98
C. $4.98
D. $2.98
Please help

Martin likes to make flower bouquets that have 3 daffodils and 4 tulips per vase. a daffodil has a mass of d grams, a tulip has a mass of t grams, and the vase has a mass of u grams. the expression 5(3d + 4t + v) describes the mass of 5 bouquets. match each amount in the situation with the expression that represents it. situation expression number of bouquets mass of one bouquet mass of the tulips in one bouquet 4t mass of the daffodils in one bouquet 3d + 4t + v

Look at attachment. has all info needed. need

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.