A firm claims that their sports drink has 140mg of potassium a random sample of 20 bottles had a mean 138 mg and a standard deviation of 2.0mg a test at 10%level is to be conducted to determine whether the true mean is less than the firms claim calculate the test statistic used for the test of the hyothesis

y < -3

step-by-step explanation:

-3y - 2 > 7

-3y -2 + 2 > 7+2

-3y > 9

-3y/-3 < 9/-3   (change the inequality sign when multiplying or dividing by a negative number)

y < -3

the answer is:

the correct option:

b.

to solve the problem, we need to remember how to operate to simplify exponential expressions using the logarithms.

we are given the equation:

then, using placing logarith with base 7 on both sides of the equation, we have:

so, rounding the obtained result to two decimal places (nearest hundreth), we have:

hence, we have that the correct option:

b.

have a nice day!

i think it is c hope that