mckenzieandjesus
  • mckenzieandjesus
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
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
mckenzieandjesus
  • mckenzieandjesus
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mckenzieandjesus
  • mckenzieandjesus
@jim_thompson5910
jim_thompson5910
  • jim_thompson5910
pythagorean theorem a^2 + b^2 = c^2 r^2 + 5^2 = (8.6)^2 solve for r

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More answers

mckenzieandjesus
  • mckenzieandjesus
would i subtracts first?
jim_thompson5910
  • jim_thompson5910
I recommend finding 5^2 and (8.6)^2 first
mckenzieandjesus
  • mckenzieandjesus
5^2+8.6^2= 98 24/25
jim_thompson5910
  • jim_thompson5910
what is 5^2 equal to
anonymous
  • anonymous
the answer is 7.0 i did out the math work
mckenzieandjesus
  • mckenzieandjesus
25
jim_thompson5910
  • jim_thompson5910
what is (8.6)^2 equal to
mckenzieandjesus
  • mckenzieandjesus
73.96
jim_thompson5910
  • jim_thompson5910
a^2 + b^2 = c^2 r^2 + 5^2 = (8.6)^2 r^2 + 25 = 73.96
jim_thompson5910
  • jim_thompson5910
first isolate r^2 to do this, subtract 25 from both sides
jim_thompson5910
  • jim_thompson5910
after that take the square root of both sides
mckenzieandjesus
  • mckenzieandjesus
subtract from 73.96 and 8.6?
jim_thompson5910
  • jim_thompson5910
no 73.96 - 25
jim_thompson5910
  • jim_thompson5910
|dw:1435616590950:dw|
mckenzieandjesus
  • mckenzieandjesus
73.96-25= 48 24/25
jim_thompson5910
  • jim_thompson5910
|dw:1435616618344:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1435616640140:dw|
mckenzieandjesus
  • mckenzieandjesus
oh oops ok
jim_thompson5910
  • jim_thompson5910
73.96-25= ??? (put it in decimal form)
mckenzieandjesus
  • mckenzieandjesus
48.96
jim_thompson5910
  • jim_thompson5910
|dw:1435616730666:dw|
jim_thompson5910
  • jim_thompson5910
take the square root of both sides |dw:1435616754593:dw|
jim_thompson5910
  • jim_thompson5910
we do this to cancel out the square over the r |dw:1435616777218:dw|
jim_thompson5910
  • jim_thompson5910
r is never negative so we don't have to worry about plus/minus
mckenzieandjesus
  • mckenzieandjesus
when i square root 48.96 its comes out as 6 sqrt 34/5
jim_thompson5910
  • jim_thompson5910
write the decimal form
mckenzieandjesus
  • mckenzieandjesus
its 15.87450...
jim_thompson5910
  • jim_thompson5910
no
mckenzieandjesus
  • mckenzieandjesus
15.646085...
jim_thompson5910
  • jim_thompson5910
use this calculator, it might be better http://web2.0calc.com/
jim_thompson5910
  • jim_thompson5910
http://web2.0calc.com/#sqrt(48.96)
jim_thompson5910
  • jim_thompson5910
that's how you type in the expression hit the equal sign to have the calculator compute the result
jim_thompson5910
  • jim_thompson5910
did you click on this link http://web2.0calc.com/#sqrt(48.96)
jim_thompson5910
  • jim_thompson5910
click on it and hit the equal sign
mckenzieandjesus
  • mckenzieandjesus
6.9971422738143606
jim_thompson5910
  • jim_thompson5910
yes
jim_thompson5910
  • jim_thompson5910
that is the approximate value of r
mckenzieandjesus
  • mckenzieandjesus
ok
mckenzieandjesus
  • mckenzieandjesus
so 7.0?
jim_thompson5910
  • jim_thompson5910
yeah if you round to the nearest tenth
mckenzieandjesus
  • mckenzieandjesus
ok thanku!
jim_thompson5910
  • jim_thompson5910
np

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