Solve the problem.The number of bacteria growing in an incubation culture increases with time according to 
where t is time in days. Find the number of bacteria when 
and 
.
A. 6700; 107,200
B. 13,400; 107,200
C. 6700; 26,800
D. 6700; 53,600
Answer: A
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The pH of a solution is given by the formula 
, where 
is the concentration of hydrogen ions in moles per liter in the solution. Use this formula to solve the problem.Lower levels of pH indicate a more acidic solution. If the pH of solution A is 4.2 and the pH of solution B is 6.9, how much more acidic is solution A than solution B?
A. 0.0000630 times as acidic B. 501.2 times as acidic C. 0.00200 times as acidic D. -0.0000630 times as acidic
Compute the average of the RRAM and LRAM approximations to estimate the area between the graph of the function and the x-axis over the given interval using the indicated number of subintervals. (The function is non-negative on the given interval).f(x) = 10 + 3x - x2 ; [0, 4] ; 4 subintervals
A. 
B. 
C. 95
D. 45
Find the indicated intercept(s) of the graph of the function.y-intercept of f(x) = 
A. (0, 10)
B. (0, 0)
C. 
D. none
Find the general term, an, of the given arithmetic sequence.2, 4, 8, 16, 32, . . .
A. an = 2n-1 + 1 B. an = 2n C. an = 2 + 2(n - 1) D. an = 2n