Well first we need think about how many years are in a week. Do you know how many weeks are in a year?
D, 221 because 21 can be divided by 3, 77 can be divided by 7 and/or 11, 110 can be divided by 11, 221---none---, 65 can be divided by 5.
Hoped this helped :)
Answer: 1540
Explanation: Just multiply or use a calculator. The prime factorization is all the prime factors, meaning you can multiply all of them to get the original number.
The answer is 26. First, you have to multiply 15 x 5. You'll get 75. Then, you add 17. You get 92. Then, add 20 + 46. You get 66. Then, subtract, and you'll get 26.
