Population growth: bacteria. A drug that stimulates reproduction is introduced into a colony of bacteria. After t minutes, the number of bacteria is given approximately by N ( t ) = 1 , 000 + 30 t 2 − t 3 0 ≤ t ≤ 20 (A) When is the rate of growth, N ′ ( t ), increasing? Decreasing? (B) Find the inflection points for the graph of N. (C) Sketch the graphs of . N and N ′ on the. same coordinate system . (D) What is the maximum rate of growth?
Population growth: bacteria. A drug that stimulates reproduction is introduced into a colony of bacteria. After t minutes, the number of bacteria is given approximately by N ( t ) = 1 , 000 + 30 t 2 − t 3 0 ≤ t ≤ 20 (A) When is the rate of growth, N ′ ( t ), increasing? Decreasing? (B) Find the inflection points for the graph of N. (C) Sketch the graphs of . N and N ′ on the. same coordinate system . (D) What is the maximum rate of growth?
Solution Summary: The author explains how the rate of change of the function N'(t) increases and decreases.
Population growth: bacteria. A drug that stimulates reproduction is introduced into a colony of bacteria. After t minutes, the number of bacteria is given approximately by
N
(
t
)
=
1
,
000
+
30
t
2
−
t
3
0
≤
t
≤
20
(A) When is the rate of growth, N′ (t), increasing? Decreasing?
(B) Find the inflection points for the graph of N.
(C) Sketch the graphs of .N and N′ on the. same coordinate system.
(D) What is the maximum rate of growth?
System that uses coordinates to uniquely determine the position of points. The most common coordinate system is the Cartesian system, where points are given by distance along a horizontal x-axis and vertical y-axis from the origin. A polar coordinate system locates a point by its direction relative to a reference direction and its distance from a given point. In three dimensions, it leads to cylindrical and spherical coordinates.
the larger of two supplementary angles exceeds 7 times the smaller by 4°. Find the measure of the larger angle.
Evaluate the integral using any appropriate algebraic method or trigonometric
identity.
S-
dy
18 √2 (1+y2/3)
y
iid
B1 Suppose X1, ..., Xn
fx(x), where
2
fx(x) = x exp(−x²/0),
0<< (0 otherwise).
(a) Find the maximum likelihood estimator of 0.
(b) Show that the MLE is an unbiased estimator of 0.
(c) Find the MSE of the MLE.
Hint: For parts (b) and (c), you may use integration by parts.
Chapter 4 Solutions
Calculus for Business, Economics, Life Sciences, and Social Sciences - Boston U.
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