Question

Suppose nicole saves 2.50 every day how much money will she have in 4 weeks

Answer 1

(2.50*7)4=70
In a week, there are 7 days. She earns 2.50 a day. There are four weeks, which means 28 days.

It can also be written as 2.50*28

Answer 2

One week has 7 days. 7 times 4 is 28.
Multiply 2.5 by 28 is 70.