Solve the problem.A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 4% cement should he mix with 4 bags of 13.5% cement to produce a mix containing 6% cement?
A. 19 bags
B. 15 bags
C. 24 bags
D. 17 bags
Answer: B
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Find y '.y = (4x3 + 6)(4x7 - 8)
A. 160x9 + 168x6 - 96x B. 16x9 + 168x6 - 96x C. 160x9 + 168x6 - 96x2 D. 16x9 + 168x6 - 96x2
Use the Law of Exponents to rewrite and simplify the expression.
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Find the focus and the directrix of the parabola.x = 2y2 + 8y + 5
A. 
; x = - 
B. 
; x = - 
C. (-1, -3); x = -5
D. (-5, -3); x = -7
Prepare a payoff matrix.A farmer must decide on which of two pieces of land to grow his crops. The first piece of land has better soil and will yield a larger harvest. However this piece of land is low lying and is coastal and his crops will be destroyed in the event of a storm and flooding. The second piece of land has poorer soil but is at a higher elevation and would not be affected by flooding. If he uses the low-lying piece of land and there is no flooding he will make a profit of $16,000. If he uses the low-lying piece of land and there is flooding, he will lose $6000. If he uses the higher piece of land and there is no flooding, he will make a profit of $10,000. If he uses the higher piece of land and there is flooding, he will make a profit of $13,000. (If there is flooding
there will be a smaller supply of the crop and his profit will be higher). Prepare a payoff matrix.
A.
| Flooding | No flooding |
B.
| Flooding | No flooding |
C.
| Flooding | No flooding |
