Question: Emma and Briana invested some capital into a business. Emma's investment is supposed to yield 15% of the capital annually while Briana's should yield 10% annually. If Emma invested $300 and Briana invested $500, what will be the difference between their return-on-investment after 2 years?
Answer: 15% of $300 is (15 / 100) * $300 = $45. Emma will earn an annual ROI of $45 for 2 years for a total of $45 * 2 = $90. 10% of $500 is (10 / 100) * $500 = $50. Briana will earn an annual ROI of $50 for 2 years for a total of $50 * 2 = $100. The difference between their ROI after 2 years is $100 - $90 = $10. The answer is 10.
[Question]Ronnie is a train engineer. His train pulls 3 red boxcars, 4 blue boxcars, and 7 black boxcars. If the black boxcars can each hold 4000 pounds of coal, which is half as much as what the blue boxcars can hold, and the red boxcars can hold 3 times as much as the blue boxcars, how many pounds of coal can all of the train's boxcars combined hold?
[Answer]If we let X represent the number of pounds of coal that the blue boxcar can hold, then 4000 = (1 / 2)X. Solving for X, we get X = 8000 pounds of coal, which represents what the blue car can hold. Thus, the red boxcar can hold 3 * 8000 = 24,000 pounds of coal. 3 red boxcars can carry 3 * 24,000 = 72,000 pounds of coal. 7 black boxcars can carry 7 * 4,000 = 28,000 pounds of coal. 4 blue boxcars carry 4 * 8,000 = 32,000 pounds of coal. Together, all the trains boxcars can carry 72,000 + 28,000 + 32,000 = 132,000 pounds of coal. The answer is 132000.
Q: Steve is 5'6". He grows 6 inches. How tall is he in inches?
A: He is 5 * 12 + 6 = 66 inches tall before the growth spurt. After growing he is now 66 + 6 = 72 inches. The answer is 72.
Question: Betty ordered 18 items in an online shop via cash on delivery. She ordered 6 pieces of slippers that cost $2.5 each, 4 pieces of lipstick for $1.25 each, and 8 pieces of hair color for $3 each. How much did Betty pay in total when it was delivered?
Answer: Betty paid 6 x $2.5 = $15 for the slippers. She paid 4 x $1.25 = $5 for the lipsticks. She paid 8 x $3 = $24 for the hair color. Therefore, Betty paid $15 + $5 + $24 = $44 in total. The answer is 44.
[Question]Maddy was given 40 chocolate eggs for Easter. She likes to eat two each day after school. If Maddy has two chocolate eggs after school each day, how many weeks will they last?
[Answer]Maddy is eating 2 eggs each day after school and there are 5 school days in a week, so she eats 2 x 5 = 10 eggs each week. Since Maddy has 40 eggs / 10 eggs each week, they will last 4 weeks. The answer is 4.
[Question]Gina has two bank accounts. Each account has a quarter of the balance in Betty's account. If Betty's account balance is $3,456, what is the combined balance of both Gina's accounts?
[Answer]
Each of Gina's account has $3456 / 4 accounts = $864 / account. Her combined account balance is therefore $864 + $864 = $1728. The answer is 1728.