Question: The building has 42 storage units that are a total of 5040 square feet. Twenty of the units are 8 by 4 feet each. If the remaining units are all the same size, what is the area, in square feet, for one of the remaining units?
Answer with step-by-step thinking: 8 * 4 = 32 square feet. 20 * 32 = 640 square feet. 5040 - 640 = 4400 square feet. There are 42 - 20 = 22 remaining units. 4400 / 22 = 200 square feet. One of the remaining units is 200 square feet.
So the answer is 200.


Question: John's weight bench can support 1000 pounds. He wants to make sure to stay 20% under that weight for safety. If he weighs 250 pounds how much weight can he put on the bar?
Answer with step-by-step thinking: He wants to stay 1000 * .2 = 200 pounds under the max. So he wants to stay under 1000 - 200 = 800 pounds. That means he can put 800 - 250 = 550 pounds on the bar.
So the answer is 550.


Question: Aaron wants to purchase a guitar under a payment plan of $100.00 per month for 12 months. His father has agreed to lend him the entire amount for the guitar, plus a one-time 10% interest fee for the entire loan. With interest, how much money will Aaron owe his dad?
Answer with step-by-step thinking:
The guitar costs $100 every month for 12 months so it costs 100 * 12 = $1200. His dad is charging him 10% interest on the $1200 so interest comes to .10 * 1200 = $120.00. All total, Aaron will owe his father the price of the guitar, $1200 and the interest, $120 so 1200 + 120 = $1,320.00.
So the answer is 1320.