Ian spent half the money he made on doing online surveys. If he worked 8 hours doing surveys and on average he's able to earn $18 per hour doing surveys, how much money does he have left? Think carefully first, then make a decision:
User
Ian is able to earn $18 per hour doing surveys. If he worked 8 hours doing surveys, then he earned $18 * 8 = $144. If he spent half of what he earned, then he spent $144 * 50% = $72. If Ian spent $72 of his earnings, then he has $144 - $72 = $72 left. So, the answer is 72.
Assistant