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worty [1.4K]
3 years ago
11

7. An administrator surveys a random sample of 48 out of 900 middle school students. Using the

Mathematics
2 answers:
Xelga [282]3 years ago
5 0

Answer:

12 students

Step-by-step explanation:

225 is 25% of 900 and 25% of 48 is 12.

Finger [1]3 years ago
5 0
12 students........:
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An electrician charges $20 for a service call plus $40 per hour of service. Write an equation in slope-intercept form for the co
Zigmanuir [339]

Answer:

Step-by-step explanation:

Regular charge- $20                                      

Every hour of service cost- $40

Equation or slope intercept form-

C= 40h+20

Part 1-  20+40(8)=

40 multiplied by 8                320+20         = $340

Part 2-  20+40(10)=

40 multiplied by 10             400+20           = $420

5 0
3 years ago
The average lateness for one of the top airline companies is 10 minutes. The variance of the lateness measure is calculated as 9
Soloha48 [4]

Answer:

The z score for the airplane arriving 13 minutes after arrival time is 0.33

Step-by-step explanation:

Using normal distribution,

The average lateness for one of the top airline companies is 10 minutes. So our mean, u = 10

The variance, s of the lateness measure is calculated as 9.

x =13 which stands for arrival time.

Using normal distribution,

z = (x - u)/s

z = (13 - 10)/9 = 3/9 = 0.33

The z score for the airplane arriving 13 minutes after arrival time is 0.33. The probability value of the z score can be found by looking at the Normal distribution table

6 0
3 years ago
What is the 6th multiple of 13?? I have no idea and I’m in set 1 rip
ki77a [65]

Answer:

78

Step-by-step explanation:

Write out the 13 times tables: 13, 26, 39, 52, 65, 78, ... 78 is the 6th number.

You can also do 13 × 6 which is 78.

Hope this helps!

8 0
2 years ago
Read 2 more answers
Consider a prism that has n faces. Write an expression that represents the number of lateral faces.
Zina [86]

A prism always has two bases. All the other faces it has are called lateral faces.
7 0
3 years ago
Find the cosine of ZS.
mylen [45]

Step-by-step explanation:

<h2>cos=adj/hyp</h2><h3> cos=12/37=cos-1 0.324</h3>

=71.09°

5 0
3 years ago
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