Lea wants to put a new layer of soil on her 14 feet by 15 feet garden. she finds the area of her garden so she knows how much soil to buy. if one bag of soil covers 20 square feet , how many bags of soil will lea need?

The parabola opens: y=√x-4 (principal square root) up down right left

Can someone me and do the problem plz so i can understand it more better

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?