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Ivahew [28]
2 years ago
7

What is 20% of 60? i need a answer now

Mathematics
1 answer:
stellarik [79]2 years ago
6 0

Answer:

12.

Step-by-step explanation:

20% is equal to .2 as a decimal.

When the question askes 20% OF 60, we know it means multiplying.

We do .2 x 60 and get 12 as our answer.

So, 20% of 60 is 12.

Hope this helps :)

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Trudy bought a $20 prepaid long distance phone card. for every minute that she talks, $0.25 is deducted from her card. The funct
Aleksandr-060686 [28]

Answer:

Step-by-step explanation:

Given the function f(m)=20-0.25m to represent the amount of money f(m) she has left after talking m minutes, the zero of the equation can be gotten by setting f(m) to 0

f(m)=20-0.25m

0 =20-0.25m

-20 = -0.25m

m = -20/-0.25

m = 80

Hence Trudy will have talked for 80minutes if she has no money left

3 0
3 years ago
The results of a common standardized test used in psychology research is designed so that the population mean is 145 and the sta
anygoal [31]

The value 155 is zero standard deviations from the mean, because x = μ , and therefore z = 0.

<h3>What is Standard Deviation?</h3>

The standard deviation is a measure of the amount of variation or dispersion of a set of values.

The key concept we need to manage here is the z-scores , and we can obtain a z-score using the next formula:

z = (x - μ)/σ      ..............[1]

Where

z is the z-score.

x is the raw score: an observation from the normally distributed data that we want standardize using [1].

μ is the population mean.

σ is the population standard deviation.

These standardized values have always the same probability in the standard normal distribution, and this is the advantage of using it for calculating probabilities for normally distributed data.

A subject earns a score of 155.

From the question, we know that:

x = 155.

μ = 155

σ = 50

Having into account all the previous information, we can say that the raw score, x = 155, is zero standard deviations units from the mean. The subject earned a score that equals the population mean. Then, using [1]:

z = (x - μ)/σ

z = (155 - 155) / 50

z = 0/50

z = 0

As we say before, the z-score "tells us" the distance from the population mean, and in this case this value equals zero:  

x = μ

Therefore, z = 0

So, the value 155 is zero standard deviations from the [population] mean.

Learn more about Standard Deviation from:

brainly.com/question/13905583

#SPJ1

8 0
2 years ago
A 20 foot extension ladder liens against a building if the base of the latter is placed 6 feet from the base of the building wha
goldenfox [79]

For this problem, you're going to need to use trig. More specifically, you need to use the tangent function:

tan (value) = opposite/adjacent

tan 75 = opposite/8 (Here, the opposite side is the length of the ladder)

8 * tan 75 = opposite

29.8564065 = opposite

So, the ladder is 29.9 feet.

6 0
3 years ago
At a​ school, 174 students play at least one sport. This is 75​% of the students at the school. How many students are at the​ sc
boyakko [2]

Answer:

  There are 232 students at the school.

Step-by-step explanation:

Let s represent the number of students at the school. We are told ...

  174 = 75% × s

  174/0.75 = s = 232 . . . . . divide by the coefficient of s

There are 232 students at the school.

3 0
3 years ago
Examples: Which type of triangle is graphed? Classify by Side and Angle. Then find the perimeter of each
OverLord2011 [107]
24372371847174819582
7 0
2 years ago
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