Problema Solution
Oberon cell phone company advertises service for 3 cents per minute plus a monthly fee of $29.95. If parker's phone bill for october was $38.95, find the number of minutes he used.
Answer provided by our tutors
let 'x' be the number of minutes used
$29.95 = 2995 cents
$38.95 = 3895 cents
3*x + 2995 = 3895
by solving we find
x = 300 min
x = 300/60 h
x = 5 h
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the number of minutes that Parker used is 300 min or 5 hours.