Q1. Yunsik has recently upgraded his smartphone and is now looking to upgrade his data plan. Flat rates are shown in the table below. Amount over the maximum allowable gigabyte (GB) for each plan are charged $15 per GB, fractional amounts included. Yunsik is uncertain how many GB he might use because of the new phone’s additional features, but his best bet is 10GB, which doesn’t align directly with any plan.
|
Plan |
Base price |
Max # of GB |
|
A |
$60 |
5 |
|
B |
$85 |
7 |
|
C |
$140 |
12 |
|
D |
$150 |
15 |
a (3 points). If Yunsik uses 10GB of data, which should he choose?
If Yunsik uses 10 GB of data then Yunsik should either go to Plan B or C with max #of 7 and 12 GB respectively as per the details provided in the plan. The other two choices either don't offer enough GB (Plan A) or a ton of GB / base charge wastage (Plan D).
We will calculate cost of Plan B and C for 10 GB usage
Plan B - Base plan will give 7 GB and rest need to be on actual usage per GB.
So total cost = base price + usage cost = 85 + (10-7)*15 =$130
Plan C - Max allowed is sufficient for 10 GB
So total cost = base price =$140
Hence plan B has a lower cost so Yunsik should choose Plan B.
Q1. Yunsik has recently upgraded his smartphone and is now looking to upgrade his data plan....