A group of 6 students organized a fundraiser to go to Nicaragua for the summer. For them to go on the trip, each of them needs at least $450. On top of that, they need $3000 for their miscellaneous collective expenses. On the first day of their fundraiser, they receive $600. On the second day, they receive $900, and on the third day, they receive $400. For the next 4 days, they receive only half of what they raised on the first 3 days. How much more money does each person need to raise for them to reach their goal? Give the rationale and then the answer.
Let's think step by step. All together, they need to raise ($450 x 6) + $3000 = $5700. The raised $600 + $900 + $400 = $1900 the first 3 days. For the next 4 days, they only raised $1900 / 2 = $950. In the week, they raised $1900 + $950 = $2850. They still need $5700 - $2850 = $2850. Each person still needs $2850 / 6 = $475.. The answer is: 475.

A driver travels 30 miles per hour for 3 hours and 25 miles per hour for 4 hours to deliver goods to a town every day from Monday to Saturday. How many miles does the driver travel in a week? Give the rationale and then the answer.
Let's think step by step. The driver travels (3 hours * 30 mph) + (25 mph * 4 hours) = 190 miles per day. From Monday to Saturday he travels in total 190 miles / day * 6 days = 1,140 miles in a week.. The answer is: 1140.

Carter is twice as tall as his 24" tall dog. Betty is 12" shorter than Carter. How tall is Betty in feet? Give the rationale and then the answer.
Let's think step by step. Carter is twice as tall as 24" dog so he is 2 * 24 = 48". Betty is 12" shorter than Carter so Betty is 48 - 12 = 36" tall. 12" is the same as 1 foot so Betty is 36 / 12 = 3 feet tall.. The answer is: 3.