Janine is paid a commission of 3% on all sales up to and including $10 000, 5% on all sales over 10 000 and 7% on sales over 25 000. How much commission will she earn on sales of $48 000? Round answer to the nearest cent.

$3,360

Step-by-step explanation:

48,000 × 0.07 = 3,360

0.07 = 7%

The critical value is

Step-by-step explanation:

A hypothesis will be used to test that a population mean equals 5 against the alternative that the population mean is less than 5

Test if the mean is less than a value, so a one-tailed hypothesis test is used.

Known variance σ.

This means that the z-distribution is used to solve this question.

What is the critical value for the test statistic for the significance level of 0.010?

Z with a p-value of 0.01, so, looking at the z-table,