Use a calculator to evaluate the square root. round to two decimal places if necessary.
enter not real if the answer is not a real number.
15

eveidence i thing that

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he has now walked a total of what?

if i know what this is maybe i can

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the solution of the equation is 2.23 ⇒ answer b

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* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places

central angle of a triangle has the same measure as its intercepted arc.

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