Locate the centroid of the plane area shown._{A: y 30 mm 30 mm {A: _{A_{A: 300 mm -240 mm x 12 in. r = 4 in. 8 in.

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Determine the centroid for the sections shown.

What is the surface area of the net shown?

E Valunte theintegral.

Find the volume of this 3 dimensional shape

You may need to use the appropriate appendix table or technology to answer this question. Individuals filing federal income tax returns prior to March 31 received an average refund of $1,057. Consider the population of "last-minute" filers who mail their tax return during the last five days of the income tax period (typically April 10 to April 15). For a sample of 400 individuals who filed a tax return between April 10 and 15, the sample mean refund was $910. Based on prior experience, a population standard deviation of  σ = $1,600  may be assumed. What is the test statistic? (Round your answer to two decimal places.)   What is the p-value? (Round your answer to four decimal places.) p-value =    Find the value of the test statistic. (Round your answer to two decimal places.)   State the critical values for the rejection rule. (Use ? = 0.05. Round your answer to two decimal places. If the test is one-tailed, enter NONE for the unused tail.) test statistic≤test statistic≥

Fire load (MJ/m2) is the heat energy that could be released per square meter of floor area by combustion of contents and the structure itself. The following cumulative percentages are for fire loads in a sample of 388 rooms: Value 0 150 300 450 600 750 900 Cumulative % 0 19.0 37.3 62.0 77.0 86.7 93.4 Value 1050 1200 1350 1500 1650 1800 1950 Cumulative % 95.1 97.9 98.3 99.5 99.6 99.8 100.0 What proportion of fire loads are less than 600? At least 1200? (Round your answers to three decimal places.) less than 600       at least 1200       (c) What proportion of the loads are between 600 and 1200? (Round your answer to three decimal places.)