Acertain number has exactly 8 factors including 1 and itself. 2 of its factors are 21 and 35 what is the number?

Marlow is comparing the prices of two trucks rental compaines company a charges $3 per hour and an addtional $75 as serivce charges company b charges $2 per hour and an additional $85 as serivce charges

What is the simplified form of square root of 400 to the 100th power ?

Can someone me immediately, this is due by midnight! if you can't see the question, i'll text it to you. show the steps you took to get your answer.