An SRS of size 150 is taken from Population A with mean 125 and standard deviation 20. An independent SRS of size 200 is taken from Population B with mean 90 and standard deviation 15. The sampling distribution of the difference in sample means has what mean and standard deviation? mean = 35; SD = 1.95 mean = 35; SD = 5.9 mean = 35; SD = 25 mean = 215; SD = 5.9 mean = 215; SD = 35

hows it hangin lol

step-by-step explanation:

wholesale price is the initial price before markup. retail price comes after the markup.

a price of 8 bucks that's marked up by 100%   is

formula: initial price + (percent markup in fraction/decimal)(initial price)

8+(1)(8)

8+8

16

retail price is $16.

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

the answer is 11.2 (i know i’m late)