Final answer:
After calculating the total costs for both Phone Plan Q and Plan R when Anthony talks for 70 minutes, Plan R is found to be less expensive by $0.90, making the correct answer B. Plan R by $0.90.
Step-by-step explanation:
To determine which phone plan is less expensive for Anthony, we calculate the total monthly cost of both plans given that he talks for 70 minutes in a month.
For Phone Plan Q, the cost is the base fee plus the cost per minute multiplied by the number of minutes:
Cost of Plan Q = Base fee + (Cost per minute × Minutes used)
Cost of Plan Q = $10 + ($0.14 × 70) = $10 + $9.80 = $19.80.
For Phone Plan R, we do the same calculation:
Cost of Plan R = Base fee + (Cost per minute × Minutes used)
Cost of Plan R = $7 + ($0.17 × 70) = $7 + $11.90 = $18.90.
Comparing the costs of both plans:
Plan Q = $19.80
Plan R = $18.90
Plan R is less expensive than Plan Q by $0.90. Therefore, the correct answer is:
B. Plan R by $0.90