In calm waters, the oil spilling from the ruptured hull of a grounded tanker spreads in all directions. Assuming that the polluted area is circular, determine how fast the area is increasing when the radius of the circle is 20 ft and is increasing at the rate of 1/6 ft/sec. Round to the nearest tenth if necessary.
What will be an ideal response?
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Use the guidelines to evaluate the study. Discuss flaws that you see in the study. A pharmaceutical company wants to test its new medication to lower blood pressure. It randomly selects 1000 people with high blood pressure and randomly assigns each person to one of two groups. The first group receives the medication for a month and also suggestions as to how to improve their diet. The control group receives a placebo medication and no dietary suggestions. At the end of the month each person's blood pressure is again taken. The average change in blood pressure is compared for the two groups.
What will be an ideal response?
Multiply or divide as indicated.
÷ 
A. 
B. x + y
C. 
D. x - y
Write the geometric series in summation notation.9 + 27 + 81 + 243 + 729
A. 
B. 
C. 
D. 
Find a polar equation for the curve represented by the given Cartesian equation.
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