Find the focus and directrix of the parabola with the given equation.11x2 = 40y
A. Focus: 
, directrix: y = 
B. Focus: 
, directrix: y = - 
C. Focus: 
, directrix: y = - 
D. Focus: 
, directrix: x = - 
Answer: B
Mathematics
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Find the perimeter of the figure.
A. 55 km B. 110 km C. 103 km D. 16 km
Mathematics
Evaluate the expression.6-1 + 7-1
A. - 1
B. 
C. 2
D. 
Mathematics
Use the change of base formula and a calculator to evaluate the logarithm. Round your answer to two decimal places.log2/319
A. 8.92 B. 7.26 C. -14.52 D. -7.26
Mathematics
If possible, evaluate the function at the given value of the variable.f(x) = 
+ 
at x = 9
A. 4 B. 5 C. 2 D. 7
Mathematics