What does the e and the r with the line in the middle means?

R- All Real numbers

E- I think it means infinity or an equivalent to an = sign

The E means "Is part of"

For example, C is part of

I don't know about the R, so hope the E problem helped!

repeat the question

step-by-step explanation:

.632

step-by-step explanation:

6 * 1/10 = 3/5

3*0.01 = 0.03

3/5 + 0.03 = .63

2*0.002 = .002

.63 + 0.002 = .632