Find the circumference of the circle with the given radius or diameter. (Use 3.14 for n.) diameter = 26 ft
a. 530.66 ft
b. 81.64 ft
C.
2,122.64 ft
d.
40.82 ft
Please select the best answer from the choices provided
А
С
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C =81.64 ft

Step-by-step explanation:

The diameter is 26

C = pi * d where d is the diameter

C = 3.14 *26

C =81.64 ft

81.64 ft.

Step-by-step explanation:

Circumference = 2 x 3.14 x 13

a

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