Which of the following are examples of inferential statistics?

check all that apply.

a. testing 1 in 10 of a company's products to determine that they are free of defects
b. testing random samples of wild animals to decide whether they are healthy
c. giving a drug test to all the athletes in the tour de france and reporting which athletes are clean
d. finding the average (mean) of a set of numbers
e. predicting whom you will someday marry

360/29

step-by-step explanation:

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