Good Taste Food Company asked 100 randomly selected students at Ridgemont High School the question, "Do you prefer pizza or a veggie burger for lunch?" and 67, percent answered "pizza."

67 percent of all students at Ridgemont High prefer pizza for lunch.

Step-by-step explanation:

Here is the complete question:

Good Taste Food Company asked 100 randomly selected students at Ridgemont High School the question, “Do you prefer pizza or a veggie burger for lunch?” and 67%, percent answered “pizza.”

Based on this data, which of the following conclusions are valid?

a. 67, percent of all students at Ridgemont High prefer pizza for lunch.

b. 67, percent of the students in the sample prefer pizza for lunch, but we cannot conclude anything about the population.

c. About 67, percent of all teenagers prefer pizza for lunch.

From the question, we are informed that Good Taste Food Company asked 100 randomly selected students at Ridgemont High School the question, which is "Do you prefer pizza or a veggie burger for lunch?" and then 67, percent answered "pizza.

Based on the scenario, this shows that 67% of the students at Ridgemont High School prefers pizza whenever they want to have lunch.

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