Answer the following question.
Mr. Isaac rides his bicycle at the rate of 10 miles per hour for 30 minutes. If he rides for another 15 miles, rests for 30 minutes, and then covers the remaining distance of 20 miles, what's the total time in minutes took to travel the whole journey?
Step-by-step reasoning process: If in one hour he covers 10 miles and rides for 15 miles at the rate of 10 miles per hour, then the time taken for the 15 miles will be 15 / 10 = 1.5 hours. The time in minutes is 1.5 * 60 = 90 minutes. The time taken for the remaining 20 miles at a rate of 10 miles per hour is 20 / 10 = 2 hours. The time in minutes is 2 * 60 = 120 minutes. The total time taken for the whole journey is the first 30 minutes + 90 + 30 minutes for resting + 120 minutes = 270 minutes.
The answer is 270.

Answer the following question.
Brenda bakes 20 cakes a day. She does this for 9 days and then sells half of the cakes. How many cakes are left with Brenda?
Step-by-step reasoning process: After 9 days, Brenda bakes 20 * 9 = 180 cakes. After she sells half of them, the remaining will be 180 / 2 = 90 cakes.
The answer is 90.

Answer the following question.
Mark constructs a cube of pure gold. The cube is 6 cm on each side. The density of gold is 19 grams per cubic centimeter. He buys the gold for $60 per gram. He sells it for 1.5 times its gold value. What was the profit?
Step-by-step reasoning process: The cube is 6 * 6 * 6 = 216 cubic cm. So it has a mass of 216 * 19 = 4104 grams. So it uses 60 * 4104 = $246240. That means he sells it for 246240 * 1.5 = $369360. So he has a profit of 369360 - 246240 = $123,120.
The answer is 123120.

Answer the following question.
Lyra has an $80 budget for a week to spend on food. If she bought 1 bucket of fried chicken that costs $12 and 5 pounds of beef that cost $3 per pound. How much is left on her weekly budget?
Step-by-step reasoning process: Five pounds of beef cost $3 x 5 = $15. So Lyra spent a total of $12 + $15 = $27. Therefore, $80 - $27 = $53 is left on her weekly budget.
The answer is 53.