3) A manufacturer makes ball bearings that are supposed to have a mean weight of 30 g. A retailer suspects that
the mean weight is actually less than 30 g. The mean weight for a random sample of 16 ball bearings is 28.6 g
with a standard deviation of 4.4g. At the 0.05 significance level, test the claim that the sample comes from a
population with a mean weight less than 30 g.

sorry i need the points

step-by-step explanation:

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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

the olimpics is not going to wokk out

step-by-step explanation: