The value of the expression B + C N 1 + T and interpret its meaning given that the matrix C represents the cost per text message and cost per minute over the maximum number of minutes allowed and matrix N 1 represents the number of text messages and the number of minutes over the maximum incurred for 1 month and matrix B represents base cost for each plan and T represents tax for each plan.
The value of the expression B + C N 1 + T and interpret its meaning given that the matrix C represents the cost per text message and cost per minute over the maximum number of minutes allowed and matrix N 1 represents the number of text messages and the number of minutes over the maximum incurred for 1 month and matrix B represents base cost for each plan and T represents tax for each plan.
Solution Summary: The author calculates the value of the expression B+CN_1+T and interprets its meaning.
To calculate: The value of the expression B+CN1+T and interpret its meaning given that the matrix C represents the cost per text message and cost per minute over the maximum number of minutes allowed and matrix N1 represents the number of text messages and the number of minutes over the maximum incurred for 1 month and matrix B represents base cost for each plan and T represents tax for each plan.
(b)
To determine
The least expensive cell phone plan given that a student has 60 text messages and talks 20 min more than maximum.
The graph of f' is below. Use it to determine where the local minima and maxima for f are. If there
are multiple answers, separate with commas.
2
f'(x)
N
-5 -4 3-2-1
-1
-2
-3
-4
12 3 4 5
-x
Local minima at x
Local maxima at x
The graph of f' is below. Use it to determine the intervals where f is increasing.
-5-4-32
4-
3
2
1
-2
-3
+x
2
3 4 5
The graph of f' is below. Use it to determine where the inflection points are and the intervals where f
is concave up and concave down. If there are multiple inflection points, separate with a comma.
6
5
4
3
2
1
f'(x)
+x
-6-5-4-3 -2 -1
1 2 3 4 5
6
-1
-2
-3
-4
-5
-6+
Inflection point(s) at x =
Concave up:
Concave down:
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