Jane wants to plant grass in het backyard. Her backyard is in the shape of a rectangle. Its length is 32 feet and its width is 21 feet. Suppose each pack of seed covers 12 square feet. How many packs of seed she need to cover the backyard

56 pack

Step-by-step explanation:

Length of backyard(L)=32feet

Width of backyard(W)=21feet

Area of backyard(A)=?

A=32x21

A=672 square feet

Each pack of seed cover 12 square feet

Therefore 672/12pack will be needed to cover the whole area of the backyard

672/12=56 pack will be needed

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

part a: 1.08

part b: 27.59