Help plz i need help

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

Will mark name all segments skew to bc

Liz is shipping a package to her friend. the maximum weight of a medium flat-rate box is 20 pounds, including the box which weighs 6 ounces. write and solve an inequality to describe the possible weight in pounds, w, of the contents that liz will ship to her friend if she must use a medium flat-rate box. use the drop-down menus to explain your answer.