Use a formula to solve the problem.Find the area of a triangle with height 9 m and base 11 m.
A. 49.5 m2
B. 198 m2
C. 10 m2
D. 99 m2
Answer: A
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Find the maximum and minimum of the function f over the closed and bounded set S.f(x, y) = x + y + 88; S = {(x, y): x2 + y2 ? 1}
A. f(0, 0) = 88; maximum. No minimum.
B. f(
, 
) = (88 + 
); maximum. f(- 
, - 
) = (88 - 
); minimum.
C. f(0, 0) = 88; minimum. No maximum.
D. f(- 
, - 
) = (88 + 
); maximum. f(
, 
) = (88 - 
); minimum.
Solve the problem.Rewrite the integral 
in the order 
.
A. 
B. 
C. 
D. 
The pH of a solution is given by the formula 
, where 
is the concentration of hydrogen ions in moles per liter in the solution. Use this formula to solve the problem.The pH value of a substance is 5.42. Find the hydrogen-ion concentration for this substance.
A. 263,026.8 B. 0.0000038 C. 1.7 D. 0.2
Evaluate the expression.
-1/2
A. 
B. not a real number
C. 
D. 