Alawn mower manufacturer incurs a total of $34,816 in overhead costs and $388 per lawn mower in production costs. how many lawn mowers were manufactured if the average cost of production is $660? the number of lawn mowers manufactured was .

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?