Example 4 Video Example ) х2 +x - 3 Let y = Use the Quotient Rule to find y'. x3 + 8 Solution (x3 y' = + 8) 2 x +x - 3 (x² x° + 8 dx dx (x3 + 8)2 し) + 8) 2x + 1 - (x2 + x - 3) 3x 2 (x3 + 8)2 (x3 )-( 3x – 3r° + 9x² + 8) 2х — 1 4 (x3 + 8)2 -x4 – 2x3 + 9x? + 16x + 8 (x³ + 8)2

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter9: Systems Of Equations And Inequalities
Section9.9: Properties Of Determinants
Problem 45E
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Question
A culture of the bacterium Salmonella enteritidis initially contains 50 cells. When introduced into a nutrient broth, the culture grows at a rate proportional to its size. After 1.5 hours, the population has increased to 825.
(a) Find an expression for the number of bacteria after t hours. (Round your numeric values to four decimal places.)
P(t) =
(b) Find the number of bacteria after 4 hours. (Round your answer to the nearest whole number.)
P(4) =
bacteria
(c) Find the rate of growth (in bacteria per hour) after 4 hours. (Round your answer to the nearest whole number.)
p'(4)=
bacteria per hour
(d) After how many hours will the population reach 250,000? (Round your answer to one decimal place.)
t =
hr
Transcribed Image Text:A culture of the bacterium Salmonella enteritidis initially contains 50 cells. When introduced into a nutrient broth, the culture grows at a rate proportional to its size. After 1.5 hours, the population has increased to 825. (a) Find an expression for the number of bacteria after t hours. (Round your numeric values to four decimal places.) P(t) = (b) Find the number of bacteria after 4 hours. (Round your answer to the nearest whole number.) P(4) = bacteria (c) Find the rate of growth (in bacteria per hour) after 4 hours. (Round your answer to the nearest whole number.) p'(4)= bacteria per hour (d) After how many hours will the population reach 250,000? (Round your answer to one decimal place.) t = hr
Example 4
Video Example )
x2 + x - 3
Let y =
Use the Quotient Rule to find y'.
x3 + 8
Solution
(43
y' =
+ 8).
+x – 3
+ x - 3)
8+ *
(x³ + 8)2
(x3 + 8)
2х + 1
- (x2 + x - 3) 3x
(x3 + 8)2
(x3 + 8)
2х - 1
3x4 – 3x + 9x?
(x3 + 8)2
-x4 - 2x° + 9x2 + 16x + 8
(x3 + 8)2
Transcribed Image Text:Example 4 Video Example ) x2 + x - 3 Let y = Use the Quotient Rule to find y'. x3 + 8 Solution (43 y' = + 8). +x – 3 + x - 3) 8+ * (x³ + 8)2 (x3 + 8) 2х + 1 - (x2 + x - 3) 3x (x3 + 8)2 (x3 + 8) 2х - 1 3x4 – 3x + 9x? (x3 + 8)2 -x4 - 2x° + 9x2 + 16x + 8 (x3 + 8)2
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