Solve.
= -6
A. x = 8
B. x = -12
C. x = 12
D. x = -8
Answer: B
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Complete the identity.sin2 x + tan2 x + cos2 x = ?
A. tan2 x B. cot3 x C. sin x D. sec2 x
Stock prices on consecutive days for a stock are shown. Find the increase (decrease) in the price of each stock as a number and the percent increase (decrease) rounded to the nearest tenth of a percent.42.19, 41.31
A. 0.88; 2.1% B. -0.88; (2.1%) C. -0.88; 2.1% D. 0.88; (2.1%)
Use the graph of a power function and transformations to sketch the graph of the polynomial function.f(x) = 
x4
A. 
B. 
C. 
D. 
Solve the problem.An agricultural research scientist is developing three new crop growth supplements -- A, B, and C. Each pound of each supplement contains four enzymes -- E1, E2, E3, and E4 -- in the amounts (in milligrams) shown in the table.
The cost of E1 is $20/mg, the cost of E2 is $40/mg, the cost of E3 is $10/mg, and the cost of E4 is also $10/mg. The growth benefit for crops is expected to be proportional to 10 times the amount of A used, 25 times the amount of B used, and 60 times the amount of C used. However, the total cost of the enzymes used in A, B, and C must be less than $5000 for each treatment. How many pounds each of A, B, and C should be produced to maximize
the growth effect? A. 0 lb of A, 0 lb of B, and 15 lb of C B. 0 lb of A, 9.3 lb of B, and 10 lb of C C. 3 lb of A, 3 lb of B, and 4 lb of C D. 9 lb of A, 0 lb of B, and 9.5 lb of C