Find the greatest common factor and the least common multiple of 12 and 20 explain I’ll give brainleast

In dire need~! describe how to use area models to find the quotient 2/3 divided by 1/5. check your work by also finding the quotient 2/3 divided by 1/5 using numerical operations only.

Use your knowledge of the binary number system to write each binary number as a decimal number. a) 1001 base 2= base 10 b) 1101 base 2 = base 10

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25