The following data table represents the total cost of a monthly cell phone bill as a function of the number of minutes that the
phone is used each month. Minutes 500 750 1,000 1,250 1,500
Total Monthly Cost (in dollars) $62 $77 $92 $107 $122
The table shows that as more minutes are used each month, the total monthly cost will increase at the same rate. Assuming that this is true, what is the total monthly cost for the cell phone if it is used for 2,500 minutes?
Area for a circle is . We will fill in each area and then solve for the radius. and . ∴ and r = 13. For b, and . , ∴ r = 17. For c, , and . ∴, and r = 11. For d, , and . ∴, so r = 25. And there you have it!