Convert. Round to the nearest tenth unless otherwise indicated.The width of the garden was 6.5 yards. Convert this length to meters.
A. 49.5 m
B. 165.1 m
C. 255.9 m
D. 5.9 m
Answer: D
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Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(-1, -5)} B. {(-2, -5)} C. no solution; ? D. {(-1, -6)}
Find the derivative.r = 17 - ?8 cos ?
A. 
= 8?7 cos ? - ?8 sin ?
B. 
= 8?7 sin ?
C. 
= - 8?7 cos ? + ?8 sin ?
D. 
= 8?7 sin ? - ?8 cos ?
Solve the problem.The concentration of alcohol in a person's blood is measurable. Suppose that the risk R (given as a percent) of having an accident while driving a car can be modeled by the equation R = 5ekxwhere x is the variable concentration of alcohol in the blood and k is a constant.Suppose that a concentration of alcohol in the blood of 0.07 results in a 10% risk 
of an accident. Find the constant k in the equation.Using this value of k, what is the risk if the concentration is 0.11?
What will be an ideal response?
Set up an integral that represents the length of the curve. Then use your calculator to find the length correct to four decimal places.
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