Find dy for the given values of x and ?x.y = x3 + 2x; x = 2, ?x = 0.01
A. 0.07
B. 0.007
C. 0.014
D. 0.14
Answer: D
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Evaluate the integral.
A. 
tan2x - 7 ln
+ C or 
tan2x + 7 ln
+ C
B. 
sec2x - 7 ln
+ C or 
tan2x - 7 ln
+ C
C. 9 sec2x + 7 ln
+ C or 9 tan2x + 7 ln
+ C
D. 
sec2x - ln
+ C or 
tan2x - ln
+ C
Use the quadratic formula to solve the given equation.9x2 + 5x + 2 = 0
A. {
, 
}
B. {
, 
}
C. {
, 
}
D. {
, 
}
Solve the problem.The half-life of a radioactive element is 130 days, but your sample will not be useful to you after 80% of the radioactive nuclei originally present have disintegrated. About how many days can you use the sample?
A. 297 B. 287 C. 302 D. 312
A store manager wants to know the demand y for an energy bar as a function of price x. The daily sales for three different prices of the energy bar are shown in the table. Price, x $0.94 $1.21 $1.55 Demand, y 490305340? ? (i) Use the regression capabilities of a graphing utility to find the least squares regression line for the data.(ii) Use the model to estimate the demand when the price is $1.38. Round your answer to the six decimal places. ?
A. (i) 
; (ii) 374.134036
B. (i) 
; (ii) -453.157181
C. (i) 
; (ii) 542.199365
D. (i) 
; (ii) -453.157181
E. none of the above