Alison paid $21.75 for a number of packets of rice crackers. three packets of rice crackers cost $1.45. how many packets of rice crackers did alison buy? if she were to buy 60 packets of the same rice crackers, would $30 be enough to pay for them? plz give me a good explanation i can understand

FIRST PART OF QUESTION:
Divide the total paid by the total cost of 3 packets (bundles)

$21.75 ÷ $1.45 = 15 (bundles)

then multiple that total [which is 15(bundles)] by the total of rice cracker packets per $1.45 [which is 3]

(15 x 3 = 45) - answer to first part of question

SECOND PART OF QUESTION:
remember, a packet (bundle) of 3 cost $1.45

first, divide the number of individual packets (60) by the number of "bundle" per $1.45 (3)

60 ÷ 3 = 20 (bundles)

to find the dollar amount of the 20 bundles; multiple by the price per bundle ($1.45)

20 x $1.45 = $29

YES is the answer

The answer would be b ! explanation: the formula for sa *surface area * is 2×l×w+2×l×h+2×w×h so in this case l=4w=12h=8so you use the formula to solve it and it give you the answer of 352^cm^2