Submit Question The concentration, in parts per million, of a type of antibiotic in a human's bloodstream after h hours can be modeled by the
polynomial -0.06.2h+ 4 = A(h). What is the concentration of the antibiotic after 4 hours?
A)
3.04 parts per million
B)
9.34 parts per million
11.04 parts per million
D)
11.75 parts per million

step-by-step explanation:

26?

step-by-step explanation:

,jkulgiurutrjyftkugyi.uykujuyxjdkytuf,yukj

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