Which number is closest to - 67 (square root)?

A. -9.2
B. -9.4
C. -7.9
D. -8.1

D. -8.1

Step-by-step explanation:

Squares of natural numbers are

{1,4,9,16,25,36,49,64,81,...}, which are squares of {1,2,3,4,5,6,7,8,9,}

As 65 lies between 64 and 81, square root of

65 lies between 8 and 9 Further, 8.1 2 = 65.61, and as 8.02 = 64, the square root of 65 lies between 8.0 and 8.1.

a; x = 0.5

step-by-step explanation:

-10x = -5

x = 0.5