I need help again so pls help me what do I write

What is the simplified form of 7 √x • 7 √x • 7 √x • 7 √x?

Toyland is having a sale. all items are 20% off. how much will you save on an item that usually sells for 95$ explain your

What kinds of numbers make up the set of numbers called the real numbers? give examples when you explain a number type. there are a limited set of types of numbers, but an unlimited number of examples of these numbers.