Effect of advertising. Suppose that SpryBorg Inc. introduces a new computer game in Houston using television advertisements. Surveys show that P % of the target audience buys the game after x ads are broadcast, satisfying P ( x ) = 100 1 + 49 e − 0.13 x . a. What percentage buys the game without seeing a TV ad ( x = 0 ) ? b. What percentage buys the game after the ad is run 5 times? 10 times? 20 times? 50 times? 60 times? c. Find the rate of change, P ' ( x ) . d. Sketch a graph of the function.
Effect of advertising. Suppose that SpryBorg Inc. introduces a new computer game in Houston using television advertisements. Surveys show that P % of the target audience buys the game after x ads are broadcast, satisfying P ( x ) = 100 1 + 49 e − 0.13 x . a. What percentage buys the game without seeing a TV ad ( x = 0 ) ? b. What percentage buys the game after the ad is run 5 times? 10 times? 20 times? 50 times? 60 times? c. Find the rate of change, P ' ( x ) . d. Sketch a graph of the function.
Solution Summary: The author explains how to calculate the percentage of people buying a new computer game without seeing ads.
Effect of advertising. Suppose that SpryBorg Inc. introduces a new computer game in Houston using television advertisements. Surveys show that P% of the target audience buys the game after x ads are broadcast, satisfying
P
(
x
)
=
100
1
+
49
e
−
0.13
x
.
a. What percentage buys the game without seeing a TV ad
(
x
=
0
)
?
b. What percentage buys the game after the ad is run 5 times? 10 times? 20 times? 50 times?
Is the function f(x) shown in the graph below continuous at x = −5?
f(x)
7
6
5
4
2
1
0
-10
-9
-8 -7
-6
-5
-4
-3
-2
-1 0
1
2
3
4
5
6 7 8 9
10
-1
-2
-3
-4
-5
-6
-7
Select the correct answer below:
The function f(x) is continuous.
○ The right limit exists. Therefore, the function is continuous.
The left limit exists. Therefore, the function is continuous.
The function f(x) is discontinuous.
○ We cannot tell if the function is continuous or discontinuous.
4. Evaluate the following integrals. Show your work.
a)
-x
b) f₁²x²/2 + x² dx
c) fe³xdx
d) [2 cos(5x) dx
e) √
35x6
3+5x7
dx
3
g) reve
√ dt
h) fx (x-5) 10 dx
dt
1+12
Elementary Statistics: Picturing the World (7th Edition)
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