Devin is asked to write out how to find the circumference of a circle. he writes: "first measure the radius, then multiply that by 2, then multiply that answer by π, and that will give you the circumference." which statement is another correct response? a) first measure the radius then multiply that by π to find the circumference. b) first measure the diameter then multiply that by π to find the circumference. c) first measure the radius, then divide that by 2, then multiply that answer by π to find the circumference. d) first measure the diameter, then divide that by 2, then multiply that answer by π to find the circumference.

exactly you go it

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