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igor_vitrenko [27]
3 years ago
15

Matt plans to put concrete on a rectangular portion on his driveway. The portion is 8 feet long and 4 inches high. The price of

concrete is $98 per cubic yard. The total cost of the concrete Matts needs is $58.07. Which of the following is closest to the width of the portion of the driveway on which Matt plants to put concrete?
Mathematics
1 answer:
marishachu [46]3 years ago
8 0
First the cost of $98 /yd³ by the conversion factor that
1 yd³ = 27 ft³.
 ($98 /yd³) (1 yd³ / 27 ft³) = $ 3 17/27/ft³

Let x be the width, the volume of the rectangular portion of the driveway is,

 V = (8 ft) (1/3 ft) x = 8x/3 ft³

Using the given total cost of the protion,
 C = $58.07 = (8x/3 ft³)(<span>$ 3 17/27/ft³) 

x = 5.99957 ft
 the answer is  6 feet. (rounded)</span>
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