Explain how nature of reactants affects the rate of reaction.                       

This person started the first detective unit.

Set up and evaluate the definite integral for the area of the surface formed by revolving the graph of about the x-axis.  

(04.06 MC)  The mean household income for a certain state is $70,000 with a standard deviation of $10,000. Assuming a Normal distribution, about 95 percent of all households have an income over what amount? (4 points)

According to the Federal Reserve, why would open market sales of bonds by the Federal Reserve decrease aggregate demand?

Barbiturate withdrawal outside of medical supervision may have severe physiological consequences including a possible risk of death.  

Two triangles can be formed with the given information. Use the Law of Sines to solve the triangles. B = 46°, a = 12, b = 11 (5 points)

Two triangles can be formed with the given information. Use the Law of Sines to solve the triangles. B = 46°, a = 12, b = 11 (5 points)

A beam has dimensions of b = 14 in., h = 28 in., d’ = 2.5 in., and d = 25.5 in. It is reinforced with 2 No. 5 bars on the compression side and 4 No. 8 bars on the tension side. The concrete strength is 4,000 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the neutral axis is c = 4.199 in., determine the strain in the compression reinforcement, ε’s.

(06.07 MC)  An analyst wants to determine the relationship between speed, in miles per hour, and the time, in hours, it takes to drive 5 miles. Twenty trials are completed and the correlation coefficient between speed and time is determined to be -0.276. Therefore, slower speed was related to greater time. How is the correlation affected if the units for time are changed from hours to minutes? (3 points)