SOLUTION: number of donuts total price 1 $0.40 box of 6 $1.89

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Question 301952: number of donuts total price
1 $0.40

box of 6 $1.89

box of 12 $3.59

1)
of the following ,which is the closest approximation of the cost per donut when one purchases a box of 6 ?
a $ 0.20 b $0.30 c $0.40 d $0.50 e $0.60
2) what would be the least amount of money needed to purchase exactly 21 donuts ?
a $5.88 b $6.68 c $7.19 d $7.38 e $8.40
Answer by london maths tutor(243) About Me  (Show Source):
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which is the closest approximation of the cost per donut when one purchases a box of 6 ?
a $ 0.20 b $0.30 c $0.40 d $0.50 e $0.60
box of 6 = $1.89
$1.89 ÷ 6 = $ 0.315
round up = $ 0.3
Answer : (b)
what would be the least amount of money needed to purchase exactly 21 donuts ?
a $5.88 b $6.68 c $7.19 d $7.38 e $8.40

1 donuts - $0.40
6 donuts - $1.89
12 donuts - $3.59
21 donuts = 12 + 6 + 1 + 1 + 1
Cost = ($3.59) + ($1.89) + (3 x $0.4)
= $6.68
Answer: (b)