A total of $24,000 is invested in two funds paying 9% and 11% interest. If, at year’s end the interest is $1,180, how much of the $24,000 is invested at 9%?
What will be an ideal response?
$14,000
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Find the derivative.y = 
A. 
cos (x3)
B. 5 cos (x3) - 5
sin (x3)
C. 6
cos (x3)
D. 5
cos (x3)
Solve the equation.-4.6 = y + 8
A. 3.4 B. -12.6 C. 12.6 D. -3.4
Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.A computer can do one calculation in 1.4 × 10-7 seconds. How long would it take the computer to do a trillion (1012) calculations?
A. 1.4 × 1012 sec B. 1.4 × 105 sec C. 1.4 × 10-7 sec D. 1.4 × 106 sec
Many bacteria strains are used by the dairy industry to produce different types of fermented milks and yogurts. During a fermentation experiment, the population y (in millions per mL) of bacteria Lactobacillus fermentum after t hours in a wheat medium satisfied the differential equation 
Initially, 10 million bacteria per mL were present.
(a) Determine the number of bacteria per mL after 4 hr. (b) Determine when 100 million bacterial per mL will be present.