Solve the problem.A recipe for fudge brownies calls for 3
cups of cocoa per batch. If you are making 3
batches, how many cups of cocoa are needed?
A. 7 cups
B. 12
cups
C. 7
cups
D. 3
cups
Answer: B
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Determine whether the argument is valid or invalid.p ? q
p
A. Valid B. Invalid
Solve the problem.Regrind, Inc. regrinds used typewriter platens. The variable cost per platen is $1.60. The total cost to regrind 80 platens is $600. Find the linear cost function to regrind platens. If reground platens sell for $10.40 each, how many must be reground and sold to break even?
A. C(x) = 1.60x + 600; 69 platens B. C(x) = 1.60x + 472; 54 platens C. C(x) = 1.60x + 600; 50 platens D. C(x) = 1.60x + 472; 40 platens
Multiply the monomials.(10x2y)(2x4y5)
A. 20x8y5 B. 12x6y5 C. 20x6y6 D. 20x6y5
If the total revenue function for a toy is 
dollars and the total cost function is 
dollars. What is the instantaneous rate of change of profit if 10 units are produced and sold? Explain its meaning.
? A. 0.20. Selling an additional unit when 10 have been sold increases profit by $0.20. B. 0.60. Selling an additional unit when 10 have been sold increases profit by $0.60. C. 6.80. Selling an additional unit when 10 have been sold increases profit by $6.80. D. 7.00. Selling an additional unit when 10 have been sold increases profit by $7.00. E. 234.00. Selling an additional unit when 10 have been sold increases profit by $234.00.