Isabelle works in a hotel and runs a bubble bath for each customer who enters the hotel. There are 13 rooms for couples and 14 single rooms. For each bath that is run, Isabelle needs 10ml of bubble bath. If every room is filled to maximum capacity, how much bubble bath, in millilitres, does Isabelle need?
Let's think: In the rooms for couples, there are 13 rooms * 2 people per room = 26 people. So in total, there are 26 people in couples' rooms + 14 people in single rooms = 40 people in the hotel. As each person gets a bubble bath, Isabelle will need a total of 40 baths * 10ml of bubble bath per bath = 400ml of bubble bath.. The answer is: 400.

A magazine costs $3 each. Jewel bought 10 magazines to be sold at $3.50 each. How much will be Jewel gain from selling these?
Let's think: Jewel's gain for each magazine is $3.50 - $3 = $0.50. Thus, her total gain will be $0.50 x 10 = $5.. The answer is: 5.

Jackson wants to improve his endurance running. His goal is to start by running 3 miles a day the first week, then spend the next four weeks running one additional mile/day each week. How many miles is Jackson running each day at the end of this exercise program?
Let's think: First, figure out how many additional miles Jackson is running after four weeks: 4 weeks * 1 extra mile / week = 4 extra miles. Then add the 4 extra miles to the 3 miles he initially ran: 4 miles + 3 miles = 7 miles.. The answer is: 7.

A cafe has 9 indoor tables and 11 outdoor tables. Each indoor table has 10 chairs, and each outdoor table has 3 chairs. How many chairs are there in all?
Let's think:
There are 9 indoor tables * 10 chairs = 90 chairs. There are 11 outdoor tables * 3 chairs = 33 chairs. The total number of chairs is 90 chairs + 33 chairs = 123 chairs.. The answer is: 123.