Robert is replacing sod in two square shaped areas of his backyard. one side of the first area is 7.5 feet. one side of the other area is 5.7 feet. the sod cost y dollars per square foot.
a. write an expression to show how much robert will spend on sod.
b. if the sod costs $3.25 per square foot, about about how much will robert spend to put sod down in both areas of his backyard? round to nearest dollar.

The area of the first plot is (7.5)² square feet, and the area of the
other one is (5.7)² square feet.

a). If sod costs 'y' dollars per square foot, then the cost for enough
sod to do the sod job is

                             Cost = (7.5² + 5.7²) y  .

b). If sod costs $3.25 per square foot, then

                               Cost = (7.5² + 5.7²) x ($3.25) =

                                     (56.25 + 32.49) x ($3.25) =

                                           (88.74)  x  ($3.25)  =  $288.405

                     Rounded to the nearest dollar, that's  $289.00 .