During a fermentation experiment, the population P(t ) (in millions per mL) of bacteria Lactobacilli reuteri after t hours in a barley medium satisfied the differential equation 
Initially, 2.1 million bacteria per mL were present.
(a) Determine the number of bacteria per mL after 4 hr.
(b) Determine when 7 million bacterial per mL will be present.
(a) 3.24304 million
(b) 12.6049 hours
Mathematics
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Decide whether the sets are equivalent.{d: d is a month of the year} and {g : g is a state in the United States}
A. Yes B. No
Mathematics
Find the volume of the solid. Use 
for ?.
A. 113
cu in.
B. 25
cu in.
C. 9
cu in.
D. 37
cu in.
Mathematics
Solve the inequality and graph the solution set.| x | > 3
A. (-3, ?)
B. (-3, 3)
C. (3, ?)
D. (-?, -3) ? (3, ?)
Mathematics
Graph the equation.f(x) = - 
x2 + 9
A. 
B. 
C. 
D. 
Mathematics