Brian is building a skating rink in the back yard. It measures 18ft by 12ft 3in. He buys 1/2inch plywood for the 2foot high sides. The plywood is 2ft by 8ft and costs $8.89 per sheet. How much will it cost Brian to build this rink, assuming no wastage or taxes?

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

Aplane is taking off from bangladesh headed to new york city. at the same time, a plane from new york city is headed to bangladesh is also taking off. the plane bound to new york city is traveling at 600 mph, while the plane traveling to bangladesh is traveling at 400 mph. how far from new york city will the two planes meet if the distance between new york city and bangladesh is 8,000 miles?

If the scale factor between two circles is 2x/5y what is the ratio of their areas?