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astra-53 [7]
4 years ago
13

It is estimated that only 68% of drivers wear their safety belt. How many people should a police officer expect pull over until

she finds a driver not wearing a safety belt
A.1
B 2
C 4
D 3
E 5
Mathematics
1 answer:
e-lub [12.9K]4 years ago
4 0

Answer:

D. 4

Step-by-step explanation:

Percent of drivers who wear seat belts = 68

Percent of drivers who do not wear seat belts = 100 - 68 = 32

Now, we know that for every 100 pull overs, 32 drivers will not be wearing belt.

32 drivers without seat-belt = 100 pullovers

1 driver without seat-belt = 100/32 pullovers

1 driver without seat-belt = 3.125 pullovers (4 pullovers)

So, a police officer should expect 4 pullovers until she finds a driver not wearing a seat-belt.

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Answer:

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Step-by-step explanation:

3 0
3 years ago
Three groups of schoolchildren receive three different types of reading instruction for a school year. At the end of the year, s
ollegr [7]

Answer:

types of reading instruction - independent variable

reading comprehension of students - dependent variable

Explanation:

When it comes to the "experimentation" of  a study, there are factors or variables that are being considered. These are <em>"independent variable</em>" and <em>"dependent variable."</em>

Independent variable refers to the variable that is being controlled. This affects the dependent variable. The influence of the independent variable on the dependent variable is <u>very important.</u>

So, in the situation above, the independent variable is the "types of reading instruction for a school year" while the dependent variable is the "reading comprehension" of the students.

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Thus, this explains the answer.

6 0
3 years ago
What is the value of x?<br><br> A. 142<br> B. 152<br> C. 76<br> D. 71
Nadusha1986 [10]

Answer:

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Step-by-step explanation:

Because this is an isosceles triangle, we know that the bottom two angles are equal.  We also know that the sum of the angles inside a triangle will always come to 180°.  With that in mind, we can simply subtract 38° from 180° and divide by two to get the correct answer.

x = (180 - 38) / 2\\= 142 / 2\\= 71

So the correct answer is D, 71 degrees.

8 0
3 years ago
Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.
FrozenT [24]
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timama [110]

When increasing a percentage I usually just turn the percentage to a decimal. So, let's say you have 100 gallons of gas and it'll get an increase by 20%, just multiply 100 by .20 and you'll get 20, then add 20 to 100 to see what you'll have after. In this case, 15% would be .15, just multiply 22 by .15 to see how much the increase is, then add what you get to 22.

4 0
3 years ago
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