Chapter 10.1, Problem 55E

$10.1$ Exercises

Surveys The president of Sam’s Supermarkets plans to hire two public relations firms to survey $500$ customers by phone, $750$ by mail, and $250$ by in-person interviews. The Garcia firm has personnel to do $10$ phone surveys, $30$ mail surveys, and $5$ interviews per hour. The Wong firm can handle $20$ phone surveys, $10$ mail surveys, and $10$ interviews per hour. For how many hours should each firm be hired to produce the exact number of surveys needed?