Mr. Herbert used wire fencing to form a border around a circular region in his back yard. If the radius of the circular region was 5 yards, what was the total length of the border, rounded to the nearest tenth of a yard? 78.5 yd
157.1 yd
15.7 yd
31.4 yd

31.4

Step-by-step explanation:

5 x 2 = 10

Use 3.14 for π.

10 x 3.14 = 31.4 yards

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d