gina is comparing four long distance phone plans. the table shows the cost of each plan.\ncost of phone…

gina is comparing four long distance phone plans. the table shows the cost of each plan.\ncost of phone plans\nplan monthly fee cost per minute\na $15 $0.05\nb $5 $0.15\nc $10 $0.10\nd $20 $0.20\nif gina plans to use 500 minutes each month, the most cost effective plan is

gina is comparing four long distance phone plans. the table shows the cost of each plan.\ncost of phone plans\nplan monthly fee cost per minute\na $15 $0.05\nb $5 $0.15\nc $10 $0.10\nd $20 $0.20\nif gina plans to use 500 minutes each month, the most cost effective plan is

Answer

Answer:

Plan C

Explanation:

Step1: Calculate cost of Plan A

$15 + 0.05\times500=15 + 25 = 40$

Step2: Calculate cost of Plan B

$5+0.15\times500 = 5 + 75=80$

Step3: Calculate cost of Plan C

$10 + 0.10\times500=10 + 50 = 60$

Step4: Calculate cost of Plan D

$20+0.20\times500=20 + 100 = 120$ Since $40<60<80<120$, Plan A costs $40$, Plan B costs $80$, Plan C costs $60$ and Plan D costs $120$, Plan C is the most cost - effective.