Identify the type of sampling described by the proposal.A market researcher randomly selects 500 homeowners under 40 years of age and 200 homeowners over 40 years of age.
A. stratified sample
B. convenience sample
C. simple random sample
D. systematic sample
E. cluster sample
Answer: A
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Solve the problem.To convert temperatures from Celsius to Fahrenheit, multiply the temperature in Celsius by 
and add 32. If the temperature is 15°C, what is the temperature in Fahrenheit?
A. -5°F B. 84.6°F C. 167°F D. 59°F
If possible, evaluate the expression by hand. If not, approximate the answer to the nearest hundredth. Variables represent any real number.
A. 36 B. 216 C. -6 D. 6
Rotate the axes so that the new equation contains no xy-term. Graph the new equation.x2 + xy + y2 - 3y - 6 = 0
A. 
B. 
Test 
for relative maximum and minimum.
?
A. A relative minimum at (0,0,8) B. A relative maximum at (0,0,3) C. A relative maximum at (1,0,8) D. A relative minimum at (0,0,3) E. A relative maximum at (3,0,0)