Express the number in scientific notation.0.000315
A. 3.15 × 10-3
B. 3.15 × 104
C. 3.15 × 10-4
D. 3.15 × 10-5
Answer: C
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Convert the units using unit fractions.80 oz = 
lb
A. 6 B. 20 C. 5 D. 8
Solve.Each month a beauty salon gives x manicures for $12.00/manicure. The cost to the owner of the beauty salon for each manicure is $7.35. The monthly fixed cost to maintain a manicure station is $120.00. Write an equation that relates the monthly profit, in dollars, to the number of manicures given each month. Then use the equation to find the monthly profit when 200 manicures are given in a month.
A. P = 7.35x - 120; $1350 B. P =12x - 120; $2280 C. P = 4.65x - 120; $810 D. P = 4.65x; $930
Write the expression as a constant, a single trigonometric function, or a power of a trigonometric function.tan2? csc2?
A. sec2? B. sin ? C. cos3? D. tan2?
Solve the problem.A hardware store has room for 400 bags of fertilizer. The fertilizer manufacturer plans to ship two kinds of fertilizer, one with 
and one without weed killer. Set up and graph an inequality involving the number of bags of fertilizer with weed killer and the number of bags without weed killer being shipped to the hardware store.
A. x + y ? 400
B. x + y ? 400
C. x + y ? 400
D. x + y ? 400