Pauline has 125 matchbox cars. They are all either convertibles, trucks, regular cars. 64% of them are regular cars. 8% are trucks. How many convertibles does she own? Give the rationale and then the answer.
Let's think step by step. The trucks and regular cars make up 72% of her collection because 64 + 8 equals 72. This means convertibles make up 28% of her collection because 100 - 72 equals 28. She has 35 convertibles because 125 times .28 equals 35.. The answer is: 35.

Pat’s computer password is made up of several kinds of alphanumeric and symbol characters for security. He uses a string of eight random lowercase letters, a string half that length of alternating upper case letters and numbers, and one symbol on each end of the password. How many characters in all is Pat‘s computer password? Give the rationale and then the answer.
Let's think step by step. The second string of characters is half as long as the first string, so it is 8 / 2 = 4 characters long. The password has one symbol on each end, so it has 1 * 2 = 2 symbol characters. In all, Pat’s computer password is 8 + 4 + 2 = 14 characters long.. The answer is: 14.

Normally Ann can frost a cake in 5 minutes. However, today she has a sprained wrist and it takes her 8 minutes to frost a cake. How much longer would it take her to frost 10 cakes with her sprained wrist? Give the rationale and then the answer.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Let's think step by step. Normally, it would take her 5 * 10 = 50 minutes. With her sprained wrist it will take her 8 * 10 = 80 minutes. 80 - 50 = 30 more minutes.. The answer is: 30.