Question

Check if I rounded this number off correctly? Thank you :)

x^2 = y^2 + 7^2
x^2 = y^2 + 49
x^2 = 7^2 + 49
x^2 = 49 + 49
x^2 = 98
x^2 = √98
x^2 = 7√2

7√2 = 3.2

Answer 1

x^2 = 7√2 is the correct form. However, I think the decimal number can round off.

Answer 2

If x = 3.1463, I would move to the thousandths place. 6 is larger than 5.

x = 3.15

Then, I move to the hundredths place.

x = 3.2