Complete the following statement. If you are asked to find the 85th​ percentile, you are being asked to find​ . Choose the correct answer below. A. a data value associated with an area of 0.85 to its right B. an area corresponding to a​ z-score of 0.85 C. a data value associated with an area of 0.85 to its left D. an area corresponding to a​ z-score of 0.85

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the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* 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