Answer:
Plan a
Explanation:
plan a costs $15, plus the amount that it would cost for 500 minutes, which is $25. (0.05*500=$25). $15+$25=$40.
If she chose plan b, it would cost $80, because $5+ (0.15*500)=$80.
Plan c would cost $60, by plugging in the numbers to the same function above.
Plan d would cost $120
Lets use 500 minutes and solve for each company:
Plan A = 15 +0.05(500) = 15 + 25 = 40
Plan B = 5 + 0.15(500) = 5 + 75 = 80
Plan C = 10 + 0.10(500) = 10 + 50 = 60
Plan D = 20 + 0.20(500) = 20 + 100 =120
Plan A is the most cost effective.
6.6m questions
8.8m answers