carlos needs 30 compasses for the students attending his summer science camp. he has a budget of $50. he…

carlos needs 30 compasses for the students attending his summer science camp. he has a budget of $50. he wants to buy compasses that have at least a 4-star review. which compass should carlos order?\na) compass a\nb) compass b\nc) compass c\nd) compass d\n\n| compass | quantity | cost | rating || ---- | ---- | ---- | ---- || a | 9 | $12 | 4.5 stars || b | 20 | $6 | 3.5 stars || c | 1 | $1.85 | 4.8 stars || d | 10 | $17.50 | 4.4 stars |

carlos needs 30 compasses for the students attending his summer science camp. he has a budget of $50. he wants to buy compasses that have at least a 4-star review. which compass should carlos order?\na) compass a\nb) compass b\nc) compass c\nd) compass d\n\n| compass | quantity | cost | rating || ---- | ---- | ---- | ---- || a | 9 | $12 | 4.5 stars || b | 20 | $6 | 3.5 stars || c | 1 | $1.85 | 4.8 stars || d | 10 | $17.50 | 4.4 stars |

Answer

Explanation:

Step1: Eliminate low-rated compasses

Compass B has a 3.5-star rating (below 4 stars), so it is disqualified.

Step2: Calculate cost per compass for A

Find unit cost: $\frac{$12}{9} \approx $1.33$ Total cost for 30: $30 \times $1.33 \approx $39.90$

Step3: Calculate total cost for C

Total cost for 30: $30 \times $1.85 = $55.50$

Step4: Calculate cost per compass for D

Find unit cost: $\frac{$17.50}{10} = $1.75$ Total cost for 30: $30 \times $1.75 = $52.50$

Step5: Compare totals to budget

Compass A: $$39.90 \leq $50$; Compass C: $$55.50 > $50$; Compass D: $$52.50 > $50$

Answer:

A) Compass A