Question

Using the following prices, calculate the unit price to determine how much it would cost for 7 granola bars and 9 bottles of water.
$7.14 for 6 granola bars
$8.72 for 8 bottles of water
a.
$18.14
b.
$18.63
c.
$21.41
d.
$31.72

Answer 1

Compute unit prices, multiply, then add.

Granola bars: $7.14 ÷ 6 = $1.19 per bar → 7 bars cost 7 × $1.19 = $8.33
Water: $8.72 ÷ 8 = $1.09 per bottle → 9 bottles cost 9 × $1.09 = $9.81

Total = $8.33 + $9.81 = $18.14

Answer: a. $18.14