Find the derivative of the function.r = 
A. r ' = 
B. r ' = - 
C. r ' = 
D. r ' = 
Answer: C
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Find the length of the curve.The cardioid r = 8(1 - sin ?)
A. 96 B. 64? C. 64 D. 96?
Solve the given differential equation.2
+ 9
+ 9y = 2x
A. y = c1e-3x + c2e-3x/2 + 
+ 
x
B. y = c1e3x + c2e3x/2 - 
+ 
x
C. y = c1e-3x + c2e-3x/2 - 
+ 
x
D. y = c1e-3x + c2e-3x/2 - 
- 
x
Make the indicated temperature conversion. Round answers to one decimal place if necessary.Andrea's sleeping bag is designed for camping in temperatures of -2°C or warmer. For what Fahrenheit temperatures is her sleeping bag designed?
A. 28.4° F or warmer B. 54.0° F or warmer C. -33.1° F or warmer D. -18.9° F or warmer
Solve. Give your answer as a mixed numeral.A drink dispenser for carbonated soft drinks is set to dispense 16 ounces of beverage when a button is pushed. At the beginning of each work day for 4 days a drink is dispensed and the quantity is carefully measured. The amounts are 
ounces, 
ounces, 
ounces, and
ounces. What was the average quantity of drink dispensed?
A. 15
oz
B. 14
oz
C. 15
oz
D. 15
oz