A quadratic function is shown below. What are the domain and range of the quadratic function? Domain: –7 < x ≤ 2 Range: –5 ≤ y ≤ 7 Domain: –7 < x ≤ 2 Range: 3 < y ≤ 7 Domain: –5 ≤ x ≤ 7 Range: –7 < y ≤ 2 Domain: 3 < x ≤ 7 Range: –7 < y ≤ 2

han when lo ahe whn hew anh ? ?

explanation:

answer: 80,000

step-by-step explanation:

the population doubles every day.

10,000*2=20,000 day 4

20,000*2=40,000 day 5

40,000*2=80,000 day 6

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