Multiply using the rule for finding the product of the sum and difference of two terms.(4 - 9r)(4 + 9r)
A. 16 - 9r2
B. 16 - 72r - 81r2
C. 16 - 81r2
D. 16 + 72r - 81r2
Answer: C
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Provide an appropriate response.Evaluate 3x2 - 3xy + 2y2 when x = 3 and y = -5.
A. 68 B. 226 C. 122 D. 138
P(3 ? T ? 4); T is Exponential (0.5).
Find the probability for the given random variable.
Solve the problem.Brian buys a book for a class he is taking. To find the sales tax, he needs to multiply by 0.045. What must he pay in sales tax for the book if the selling price is $19? Round the answer to two decimal places.
A. $0.86 B. $0.76 C. $1.06 D. $0.91
For the demand function given, find the elasticity at the given price and state whether the demand is elastic, inelastic, or whether it has unit elasticity.q = D(x) = 300 - 4x; x = 62
A. 
; inelastic
B. 
; inelastic
C. 52; elastic
D. 
; elastic