Lettuce (Word Problem) Help, PLEASE?

Fatima is the produce manager for a local grocery store. Information provided by the grower and shipper states tat the iceberg lettuce will stay fresh for 21 days at 35 degrees, for 15 days at 40 degrees, for 10 days at 45 degrees, and for 1 day at 70 degrees. During a heat wave Fatima [...]

What is the largest power of 5 that divides the product of the first 100 positive integers?

I need help on how to solve this problem, can you please explain how you did so I can understand. Power of 5 is like 5^x and remember, it’s the LARGEST power of 5 that DIVIDES the PRODUCT of 1×2×3…98×99×100. Thanks!
The product of those integers is a multiple of 5 because I’ve found a pattern [...]