SOLUTION: a long distance phone call costs $.10 for the first minute and $.05 for each additional minute or portion therof. Write an inequality representing the number of minutes a person c
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Question 98128: a long distance phone call costs $.10 for the first minute and $.05 for each additional minute or portion therof. Write an inequality representing the number of minutes a person could talk without exceeding $20 Found 2 solutions by checkley71, mathslover:Answer by checkley71(8403) (Show Source):
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the cost for talking for time t = 0.10 + (t-1).05
since cost should not exceed $20
0.10 + (t-1).05 <=20
10 + (t-1)5 <=2000 multiplying by 100 throughout
2 + t-1 <=400 dividing by 5
t+1<=400
t<=399
maximum time a person could talk is 399 minutes
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