Answer this question:If eight liters is 20% the capacity of a container filled with water, calculate the total capacity of 40 such containers filled with water.
If eight liters is 20% the capacity of a container filled with water, when the container is full, which is 100%, the container will contain 100% / 20% * 8 liters = 40 liters. The total capacity of 40 such containers filled with water is 40 * 40 = 1600 liters.
The answer is 1600.

Answer this question:Thomas, Toby, and Rebecca worked a total of 157 hours in one week. Thomas worked x hours. Toby worked 10 hours less than twice what Thomas worked, and Rebecca worked 8 hours less than Toby. How many hours did Rebecca work?
Toby: 2x - 10. Rebecca: (2x - 10) - 8 = 2x - 18. Total:2x - 10 + 2x - 18 + x = 157. 5x - 28 = 157. 5x = 185. x = 37 hours. Rebecca:2(37) - 18 = 56 hours.
The answer is 56.

Answer this question:Drew is 5 years older than Maya. Peter is 4 years older than Drew. John is 30 and is twice as old as Maya. In 2 years, Jacob will be exactly half of Peter's age. How old is Jacob now?
If John is 30 and twice as old as Maya then Maya is 30 / 2 = 15 years old. Drew is 5 years older than Maya so Drew is 15 + 5 = 20 years old. Peter is 4 years older than Drew so is 20 + 4 = 24 years old. In 2 years, Peter will be 24 + 2 = 26 years old. Half of Peter's age in 2 years will be 26 / 2 = 13 years old and Jacob's age in 2 years. Jacob now is 13 - 2 = 11 years old.
The answer is 11.

Answer this question:Ruiz receives a monthly salary of $500. If he received a 6% raise, how much will be Ruiz's new salary?
Ruiz has $500 x 6 / 100 = $30 salary raise. Thus, his new salary is $500 + $30 = $530.
The answer is 530.