A researcher studies the relationship between the number of hours of sleep per night and the performance on a memory test. Study participants are randomly selected to get no sleep or
sleep in 1-hour increments, up to 8 hours total (that is, the participant gets 1 hour, 2 hours, and
so on, up to 8 hours of sleep). The researcher determines that the association between the
two variables can be modeled with the linear equation p = 9h +15, where his number of hours
of sleep and p is the percentage score on the memory test.

0.32

step-by-step explanation:

2.24/7

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

pla·gia·rism

/ˈplājəˌrizəm/

learn to pronounce

noun

the practice of taking someone else's work or ideas and passing them off as one's own.

step-by-step explanation: