Use substitution to determine whether the given number is a zero of the given polynomial.1; g(x) = x4 + 8x2 - 6
A. Yes
B. No
Answer: B
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Compute the compound interest.At what interest rate must $4000 be compounded annually to equal $9639.38 after 13 yr? (Round to the nearest percent.)
A. 6% B. 8% C. 7% D. 9%
Sketch the given exponential curve.y = -5t
A. 
B. 
C. 
D. 
The demand function for a certain make of replacement cartridges for a water purifier is given by
?
?
where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. Determine the consumers' surplus if the market price is set at $1/cartridge. Round your answer to the nearest dollar.
?
A. $22,006 B. $21,526 C. $21,445 D. $21,667
Solve the problem using Snell's Law: 
= 
.The index of refraction of light passing from air into a second medium is 1.40. If the angle of incidence is 
what is the angle of refraction (to two decimal places)?
A. 42.48° B. 45.13° C. 44.87° D. 47.52°