Part a: estima-te the total cost.
part b: what is the exact cost?
part c: if the family pays $25,what is the exact amount of change they should receive?

Step-by-step explanation:

Part A:

Total cost for 2 adults at $5.5 each and 3 students at $4.25 each

= 2*5.5 + 3*4.25

~= 12 +  12

= $24

Part B:

Exact cost = 11 + 12.75

= $23.75

Part C: If the family pays $25,

the exact change = 25 - 23.75

= $1.25

1

step-by-step explanation:

it's the only multiple of both and the least

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