Group the objects into classes so that all the elements within each class are topologically equivalent and no elements from different classes are topologically equivalent.
A. A, B and D; C
B. A; B and D; C
C. A; B, C and D
D. A,B,C, and D
E. A, C and D; B
Answer: B
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To find the number of units that gives break-even for the product, solve the equation R = C. Round your answer to the nearest whole unit.A manufacturer has total revenue given by the function R = 70x and has total cost given by 
where x is the number of units produced and sold.
A. 1208 units B. 120 units C. 7250 units D. 20 units
Solve.The approach ramp used by a daredevil motorcyclist for flying over a collection of flaming telephone booths has a rise of 45 feet for every 90 feet in horizontal distance. Find the grade of the ramp. Round to the nearest whole percent.
A. 0.5% B. 20% C. 50% D. 55%
Simplify the expression. Assume that all variables are positive.
? 
A. 
B. 
C. 
D. 
Express in terms of i.
A. i
B. -8i
C. 8i
D. ±8