Solve the problem.The focal length f of a lens with index of refraction n is 
= (n - 1)
where R1and R2 are the radii of curvature of the front and back surfaces of the lens. Express f as a rational expression.
A. f = 
B. f = 
C. f = 
D. f = 
Answer: A
Mathematics
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The question(s) that follow refer to the problem of finding the minimum spanning tree for the weighted network shown below.
Using Kruskal's algorithm, which edge should we choose last?
A. BC B. AB C. AC D. CD E. none of these
Mathematics
Solve the equation.4(1 + 2x) = 1024
A. {-2} B. {8} C. {256} D. {2}
Mathematics
Solve. Write the answer as a mixed number in simplest form.On a recent trip, Asha drove 238 miles on 16
gallons of gasoline. How many miles per gallon did she average?
A. 3842 mpg
B. 544
mpg
C. 
mpg
D. 14
mpg
Mathematics
Find the exact value of the expression.cos-1 (-1)
A. 0
B. 2?
C. 
D. ?
Mathematics