[Question]: Walter fell from the eighth platform of some scaffolding and fell past David after falling 4 meters. If he fell for an additional three more times that depth before hitting the ground, and the platforms are evenly spaced out in height, what platform was David on?
[Answer]: Walter fell 4 meters and an additional three times that depth which is 3 * 4 = 12 meters. He fell for a total of 4 + 12 = 16 meters. The eighth platform is 16 meters high and the platforms are evenly spaced so each platform is 16 / 8 = 2 meters high. David was located 4 meters below the 16 meter level which is 16 - 4 = 12 meters high. Each platform is 2 meters high so 12 meters would mean the 12 / 2 = 6th platform.
So the answer is 6.

[Question]: Javier spends 30 minutes outlining his speech, 28 more minutes writing than outlining, and half as much time practicing as writing. How much time does he spend on his speech in total?
[Answer]: First find the total time Javier spends writing: 30 minutes + 28 minutes = 58 minutes. Then divide that amount of time by 2 to find how much time he spends practicing: 58 minutes / 2 = 29 minutes. Then add the time he spends outlining, writing and practicing to find his total time spent: 29 minutes + 58 minutes + 30 minutes = 117 minutes.
So the answer is 117.

[Question]: Charlotte needs to know how much money to have with her when she goes to the shoe store. How much money should Charlotte bring to buy a pair of boots, if the original price is $90 and there is a discount of 20%?
[Answer]:
The amount of the discount is 20 / 100 * $90 original price = $18. Charlotte needs to bring the $90 - $18 discount = $72.
So the answer is 72.