# Algebra

posted by .

a cellular phone company offers a contract for which the cost C in dollars of t minutes is given by C 0.25 (t-300)+ 61.95 where it is assumed that t¡Ý 300 minutes what time will keep \$99.45 and 145.95

• Algebra -

Solve 99.45 = 0.25 (t-300)+ 61.95
for time, t

Then repeat the process for
145.95 = 0.25 (t-300)+ 61.95

## Similar Questions

1. ### Math 116

A cellular phone company offers a contract for which cost C, in dollars, of T minutes of telephoning is given by C=0.25(t-600)+43.95 where it is assumed that T equal or less than 600 minutes. what times will keep costs between \$82.70 …
2. ### algebra

A cellular phone company offers a contract for which the cost C, in dollars, of t minutes of telephoning?
3. ### Last Math problem I promise

a cellular phone company offers a contract for which the cost C, in dollars of t minutes of telephoning is given c=0.25(t-300)+65.95 where it is assumed that t >== 300 minutes what times will keep costs between 106.20 and 139.20?
4. ### Math 116

A cellular phone company offers a contract for which is cost c,in dollars,of t minutes of telephoning is given by c=0.25(t-600)+61.95, where it is assumed that t>=600 minutes. What times will keep costs between #100.45 and \$130.95?
5. ### alegebra

a cellular phone company offers a contract for which the cost C, in dollars, of t minutes of telephoning is given C=0.25(t-500)+80.95, where it is assumed that t>=500 minutes. What times will keep cost between \$123.45 and \$146.95?
6. ### math

A cellular phone company offers a a contract for which the cost C, in dollars, of t minutes of telephoning is given by C=0.25(t-600) + 40.95, where it is assumed that t ¡Ý600 minutes. What times will keep costs between \$83.45 and …
7. ### algebra

a celluar phone company offers a contract which the cost c, in dollars, of t minutes of telephoning is given by c=0.25(t-600) plus 57.95 where it is assumed that t is > or eqaul to 600 minutes. what time will keep cost below 102.45 …
8. ### Math

A cellular phone company offers a contract for which the cost C, in dollars, of t minutes of telephoning is given by C=0.25(t-500)+ 56.95, where it is assumed that t is greater than or equal to 500 minutes. What times will keep cost …
9. ### Algebra

A cellular phone company offers a contract for which the cost C, in dollars, of t minutes of telephone is given by C=.25(t-600)+50.95, wher it is assumed that t is greater than or equal to 600 minutes. What times will keep costs between …
10. ### Math

A cellular phone company offers a contract for which the cost C, in dollars, of t minutes of telephoning is given by C=0.25(t-300)+79.95, where it is assumed that t≥300 minutes. What times will keep costs between \$127.45 and …

More Similar Questions