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Algebra
Pregunta

A phone company offers two monthly charge plans. I...

A phone company offers two monthly charge plans. In Plan A, there is no monthly fee, but the customer pays \( 8 \) cents per minute of use. In Plan B, the customer pays a monthly fee of \( \$ 13.50 \) and then an additional \( 5 \) cents per minute of use. For what amounts of monthly phone use will Plan A cost at least as much as Plan B? Use \( m \) for the number of minutes of phone use in a month, and solve your inequality for m. 

Answer

\(8x\ge 1350+ 5x\\3x\ge 1350\\x\ge 450\)

Solución
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