Question

Mark multiplied a number by itself. He found a

product of 30. What is the number, rounded to the
nearest tenth?
A. 4.5
B. 5.4
C.5.5
D. 15.0

Answer 1

C.] 5.5

Explanation:

It is mentioned that the number was multiplied by the number itself.

Let's take 'x' as the number. It was multiplied by itself and the product is 30. So the equation will be:

x × x = 30

`x^(2)` = 30

x =
`√(30)`

x = 5.47 = 5.5 (to the nearest tenth)

Answer 2

5.5×5.5=30.5

we rounded 30.25 in nearest tenth it becomes 30