2. Arielle owns Levitt Construction Corporation. She needs a welder and is placing a seven-line classified ad. The cost of an ad that is x lines long is given by the following
piecewise function. Find the cost of a seven-line ad.
133
when xs4
c(x) =
133 + 5(x-4) when x>4
use the second equation:
Because 7 >
c(x) =
Substitute 7 for x:
c(x) =
The total cost of a 7-line ad is
82
Financial Algebra Guided Practice Workbook 6-1
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Amanufacturing firm has been averaging 16.8 orders per week for several years. however, during a recession, orders appeared to slow. suppose the firm’s production manager randomly samples 31 weeks and finds an average of 15.6 orders with a standard deviation of 2.3 orders. using a 0.025 significance level, test whether the mean number of orders has decreased. type the full 5 step procedure into the answer box, then for multiple choice practice, answer the following: 1. what is the name and symbol of the parameter that you are testing? 2. what is the symbol and value of the point estimate of that parameter? 3. what distribution are you using to test this parameter? 4. what is the critical value? 5. what is the test statistic value? 6. what is the p-value?