jmc

Question

Kirsty needs to hire a plumber to fix her house. The plumber charges 242_5 dollars for every hour of labor and 367_8 dollars for equipment. If the plumber works for 3.5_10 hours, how many dollars (in base ten) will Kirsty owe the plumber?

Accepted Answer

For every hour of labor, 242_5=25^2+45^1+25^0=72. For equipment, 367_8=38^2+68^1+78^0=247. Therefore, 3.5(72)+247=499 dollars.