Find the circumference leave your answer in terms of pi.

(D) is correct

Step-by-step explanation:

Given: A circle with diameter 8.4 centimeters.

To find: The circumference of the given circle.

Solution: It is given that a circle has a diameter of 8.4 cm, therefore radius of the circle will be:

.

Now, the circumference of the circle is given as:

Substituting the given values, we have

Thus, the circumference of the circle will be .

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option