Min jee wants to build a small patio using either brick or paver stones. it will be 70 inches long and 49 inches wide. each brick covers an area of 3 1/2 inches by 7 1/2 inches, and cost $0.59. each paver covers an areas 8.4 inches by 8.4 inches and costs $1.88. what would be less expensive to use, and by how much?

Answer

It would be less expensive to use bricks.

It would be less by ($91.3889 - 71.0933) = $14.2956

Explanations

Area of patio to be build = 70 × 49

                                         = 3,430 in²

Area covered by 1 brick = 7.5 × 3.5

                                       = 26.25 in²

Number of bricks needed to build the patio = 3430 ÷ 26.25

                                                                            = 130 2/3 bricks

Cost of building the patio = 130 2/3 × $0 59

                                            = $77.0933

Area of one paver = 8.4 × 8.4

                              = 70.56 in²

Number of pavers = 3430 ÷ 70.56

                               = 48 11/18 pavers

cost of bulding using paver = 48 11/18 × $1.88

                                              = $91.3889

It would be less expensive to use bricks.

It would be less by ($91.3889 - 71.0933) = $14.2956

the multiples of 15 are 15, 30,45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195,   210, 225, 240, 255, 270, 285, 300, 315, 330, 345, 360, 375,   390, 405, 420, 435, 450, 465, 480, 495, 510, 525, 540, 555, 570, 585, 600, 615, 630, 645, 660, 675, 690, 705, 720, and 735.

the factors of 15 are 1, 3, 5, and 15.

hope that , fam!

-une, your fren : )