Answer: package B is the better deal.
Step-by-step explanation:
package A offers free phone and 300 minutes. it will cost 0.12 per minute for each minute over the plan time. Also, package A has a base rate of $39.95. This means that if you average 356 minutes per month in talk time, the cost using package A would be
0.12(356 - 300) + 39.95 = $46.67
package B : phone costs $10 and has 350 minutes of time and 0.08 per minute for each minute over the plan time. Also, package B has a base rate of 35.95 not including the phone. This means that if you average 356 minutes per month in talk time, the cost using package B would be
10 + 0.08(356 - 350) + 35.95 = $46.43
Therefore, package B is the better deal since it is cheaper.