Answer the question.If (a,b) is a critical point in the interior of the domain of f(x,y) and if 
then f has a local minimum at (a,b) if(i) H > 0 and fxx(a,b) > 0.(ii) H > 0 and fxx(a,b) < 0.(iii) H < 0.
A. Only (iii) is correct.
B. Only (i) is correct.
C. Only (ii) is correct.
D. (i), (ii), and (iii) are all incorrect.
Answer: B
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Perform the indicated operations and simplify.
A. 
B. 
C. 
D. 
E. 
Solve the equation. Express radicals in simplest form.
m2 = - 
m + 
A. ?
B. 
C. 
D. 
Simplify. Write your answer using only positive exponents. Assume that all variables represent nonzero numbers.4-3 ? 46
A. 163 B. 4-18 C. 43 D. 1618
For a certain car, the distance traveled by the car while trying to stop is given by the equation d = 0.09r² + r, where r is the speed of the car in miles per hour, and d is the distance needed to stop in feet. Find the total number of feet needed to stop the car traveling at 46 miles per hour. Round any approximate value to 2 decimal places.
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