Solve the problem.The cost of a computer system increases with increased processor speeds. The cost C of a system as a function of processor speed is estimated as 
where S is the processor speed in MHz. Find the processor speed for which cost is at a minimum. Round to the nearest tenth if necessary.
A. 3 MHz
B. 7.5 MHz
C. 0.4 MHz
D. 0.3 MHz
Answer: C
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Find the volume generated by revolving about the x-axis the regions bounded by the following graphs.
Provide an appropriate response.Evaluate 9x - 4(x + 7) for x = -8.
A. -63 B. -71 C. -82 D. -68
Evaluate the factorial expression.
A. 1680 B. 70 C. 140 D. 35
Suppose a population of scores x is normally distributed with src="https://sciemce.com/media/3/ppg__cognero__Chapter_08_Further_Topics_in_Probability_Data_Description__media__d2b704ce-bc7d-459c-93f5-9749237b351d.PNG" class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_b407d25286c84d41b6d5a51ab" />. Round your answer to four decimal places.
?
A. 0.0980
B. 0.1378
C. 0.2358
D. 0.0398
E. 0.1179
and 
Use the standard normal distribution to find