Solve the problem.The number of turns N required in a solenoid of length l (in m) is given by N = ,where L represents inductance (in appropriate units), ? is a constant, and A represents cross-sectional area (in square meters). If     and -4.0px;" /> find the number of turns required, to the nearest whole turn.

A. 5700 turns
B. 700 turns
C. 488,000 turns
D. 11 turns

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Answer: B

Mathematics

Determine whether the following is true or false.A ?  is equal to the universal set U.

A. True B. False

Solve.Northwest Molded molds plastic handles which cost $0.30 per handle to mold. The fixed cost to run the molding machine is $1435 per week. If the company sells the handles for $1.30 each, how many handles must be molded and sold weekly to break even?

A. 1435 handles B. 4783 handles C. 896 handles D. 956 handles

Solve the equation.(10 - 0.8x)(5 - 0.4x) = 0

A. 10, 5 B. 12.5, 12.5 C. 12.5, 0.2 D. 0.8, 5

Solve.A young married couple had a combined annual income of $48,000. If the wife made $6000 more than the husband, graph the system to find the two incomes.

A. Wife's income: $12,000 Husband's income: $36,000 B. Wife's income: $36,000 Husband's income: $12,000 C. Wife's income: $21,000 Husband's income: $27,000 D. Wife's income: $27,000 Husband's income: $21,000