Question 301952
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)