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vanessanne
Keith is starting a part-time computer repair business out of his home. He plans to charge $15 per hour. His monthly expenses include $490 for equipment rental, $45 for materials and $65 for a business phone. Write and solve an inequality to find the number of hours he must work in a month to make a profit of at least $600.
\[15t-490-45-65\geq600.\]