Answer the following question.
Derek finally gets his own allowance. He puts $2 away in January, $4 away in February, $8 away in March, $16 away in April and follows this savings pattern through to December. How much money does he have to spare and save by December?
Step-by-step reasoning process: Derek doubles his allowance savings each month, so in May, Derek has $16 * 2 = $32. In June, Derek has $32 * 2 = $64. In July, Derek has $64 * 2 = $128. In August, Derek has $128 * 2 = $256. In September, Derek has $256 * 2 = $512. In October, Derek has $512 * 2 = $1024. In November, Derek has $1024 * 2 = $2048. By December, Derek has $2048 * 2 = $4096 to save.
The answer is 4096.

Answer the following question.
Carly practices her butterfly stroke for 3 hours a day, 4 days a week, and her backstroke for 2 hours a day, six days a week. How much time does she spend practicing swimming in a month with 4 weeks?
Step-by-step reasoning process: First find the total time Carly practices the butterfly stroke in a week: 3 hours / day * 4 days / week = 12 hours / week. Then find the total time Carly practices the backstroke stroke in a week: 2 hours / day * 6 days / week = 12 hours / week. Then add those two amounts of time to find her total practice time each week: 12 hours / week + 12 hours / week = 24 hours / week. Then multiply her weekly practice time by the number of weeks in a month to find her monthly practice time: 24 hours / week * 4 weeks / month = 96 hours / month.
The answer is 96.

Answer the following question.
Seth and his brother want to see their favorite band in concert. The tickets are $50.00 each. There is a 15% processing fee for the tickets. They are also charged $10.00 for parking and an additional $5.00 per person entrance fee. How much will it cost to go to the concert?
Step-by-step reasoning process: The tickets are $50.00 each and they need 2 tickets so that's 50 * 2 = $100.00. There is a 15% processing fee for the tickets so that's 100 * .15 = $15.00. The tickets are $100.00 and the processing fee is $15.00 for a total of 100 + 15 = $115.00. There is a $5.00 per person entrance fee and there are 2 people so that's 5 * 2 = $10.00. The tickets are $115.00, parking is $10.00 and the entrance fee is $10.0 for a total of 115 + 10 + 10 = $135.00.
The answer is 135.

Answer the following question.
Herman likes to feed the birds in December, January and February. He feeds them 1/2 cup in the morning and 1/2 cup in the afternoon. How many cups of food will he need for all three months?
Step-by-step reasoning process: December has 31 days, January has 31 days and February has 28 days for a total of 31 + 31 + 28 = 90 days. He feeds them 1 / 2 cup in the morning and 1 / 2 cup in the afternoon for a total of 1 / 2 + 1 / 2 = 1 cup per day. If he feeds them 1 cup per day for 90 days then he will need 1 * 90 = 90 cups of birdseed.
The answer is 90.