is tangent to circle O at B. What is the length of the radius r? Round to the nearest tenth. 13.0 3.6 7.0 9.9

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is tangent to circle O at B. What is the length of the radius r? Round to the nearest tenth. 13.0 3.6 7.0 9.9

Geometry
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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pythagorean theorem a^2 + b^2 = c^2 r^2 + 5^2 = (8.6)^2 solve for r

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Other answers:

would i subtracts first?
I recommend finding 5^2 and (8.6)^2 first
5^2+8.6^2= 98 24/25
what is 5^2 equal to
the answer is 7.0 i did out the math work
25
what is (8.6)^2 equal to
73.96
a^2 + b^2 = c^2 r^2 + 5^2 = (8.6)^2 r^2 + 25 = 73.96
first isolate r^2 to do this, subtract 25 from both sides
after that take the square root of both sides
subtract from 73.96 and 8.6?
no 73.96 - 25
|dw:1435616590950:dw|
73.96-25= 48 24/25
|dw:1435616618344:dw|
|dw:1435616640140:dw|
oh oops ok
73.96-25= ??? (put it in decimal form)
48.96
|dw:1435616730666:dw|
take the square root of both sides |dw:1435616754593:dw|
we do this to cancel out the square over the r |dw:1435616777218:dw|
r is never negative so we don't have to worry about plus/minus
when i square root 48.96 its comes out as 6 sqrt 34/5
write the decimal form
its 15.87450...
no
15.646085...
use this calculator, it might be better http://web2.0calc.com/
http://web2.0calc.com/#sqrt(48.96)
that's how you type in the expression hit the equal sign to have the calculator compute the result
did you click on this link http://web2.0calc.com/#sqrt(48.96)
click on it and hit the equal sign
6.9971422738143606
yes
that is the approximate value of r
ok
so 7.0?
yeah if you round to the nearest tenth
ok thanku!
np

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