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important1. A normally-distributed data set has a mean of 30 and a standard deviation of 5.
What is the area under the standard normal curve for data greater than 25?
Round your answer as a decimal rounded to the nearest thousandth.
Note: Do not give your answer as a percent.
2. Which answer represents the inequality x≤−5 or x≥3 in interval notation?

(−∞, −5) ∩(3, ∞)
(−∞, −5] ∩[3, ∞)

(−∞, −5) ∪(3, ∞)
(−∞, −5] ∪[3, ∞)
3. What is the margin of error for a sample statistic for a population with a standard deviation of 6.8?
The margin of error is ±
.
4. The average number of hours of television watched daily by players in a baseball league is 2.
A group of players were asked how much television they watched on the previous Friday. The
number of hours are shown in the table.
2
4
1
3
0
0.5
1
2
0.5
3
3
1
Enter the sample mean and the population mean.
Sample mean:
Population mean:
5. Enter the product of 4−6i and 2+3i in the box.
6. Which graph represents the inequality?
x−2y>−6

7. What is the system of linear inequalities that represents the graph?
8. What is the solution to the system of equations?
5x−3y+z=−6
x+3y−z=0
4x+y+z=7
x=
y=
z=
9. What is the solution to the inequality?
−2(x+3) +5x>9
10. Multiply.
3√⋅5√⋅7√
11. Simplify.
(−5+2i) −(10−3i)

−15+5i
−15−5i

5−i
−15−i
12. Gerry is a restaurant manager and plans to advertise her restaurant. The advertising budget is
\$5000, and she plans to run television and online ads. She would like to run at least 5 television ads
and 10 online ads. A television ad costs \$500 and an online ad costs \$150.
Let x represent the number of television ads and y represent the number of online ads.
Two of the constraints for this situation are
x≥5 and y≥10.
What is the other constraint for this situation?
13. The table shows the number of minutes some employees cycle each week.
Minutes cycling per week
Frequency
60
3
120
12
180
9
240
3
300
3
Create a bar graph that represents the probability distribution for this frequency table.
To create a bar graph, hover over each number at the bottom of the graph. Then click and drag up to
create the bars. The probabilities will be percents.
Total Minutes Cycled Each Week60120180240300Minutes05101520253035404550Percent

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