Question

Round to the nearest tenth

Answer 1

7.0

Explanation:

Tangents form right angles, so AOB is a right triangle.

Now using Pythagorean Theorem (A^2 + B^2 = C^2), plug in the values and solve inversely.

5^2 + B^2 = 8.6^2

25 + B^2 = 73.96

B^2 = 48.96

B = squareroot 48.96

B = 6.997 --> 7.0

Answer 2

Answer: r is 7

Explanation:

ABO is a right triangle

`a^(2) +b^(2) =c^(2) \\5^(2) +b^(2) =8.6^(2) \\25+b^(2) =73.96\\b^(2) =48.96\\b=6.997`