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Pavlova-9 [17]
2 years ago
7

There are two calculus classes at your school. Both classes have a class average of 75.5. The first class has a standard deviati

on of 10.2 and the second has a standard deviation of 22.5. How do the classes compare?
Mathematics
1 answer:
Korvikt [17]2 years ago
4 0
To compare the two classes, the Coefficient of Variation (COV) can be used. The formula for COV is this:
C = s / x
where s is the standard deviation and x is the mean
For the first class:
C1 = 10.2 / 75.5
C1 = 0.1351 (13.51%)

For the second class:
C2 = 22.5 / 75.5
C2 = 0.2980 (29.80%)

The COV is a test of homogeneity. Looking at the values, the first class has more students having a grade closer to the average than the second class.
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The hawks soccer team won 12 out of 14 games. If this rate continues, how many games will they win if they play a total of 21 ga
Schach [20]
1) 12 out of 14 = 85% Win Rate
2) Now you have to figure out what is 85% of 21 so you have to plug in what you have ? out of 21 = .85
3) Multiply 21 x .85 
4) Answer is They will win 18 out of 21 games


8 0
2 years ago
A car travels at the rate of x miles per hour for y minutes. which of the following gives the number of miles the car has travel
harkovskaia [24]

Given that speed of car = x miles per hour

Time of travel = y minutes = y/60 hours

(Because there are 60 minutes in an hour)

We have to calculate distance travelled so we will use formula

Distance = speed * time

Distance = x * y/60

Distance = xy/60

Hence choice d) xy/60 is the final answer.

7 0
3 years ago
Find the equation of the exponential function represented by the table below:
Leona [35]

Answer:

The exponential equation is;

y = 0.1•0.5^x

Step-by-step explanation:

Here, we want to get the exponential function represented by the table

Mathematically, the general form of an exponential function is;

y = a•b^x

By getting a and b, we have the exponential function

We can use any of the points;

Let us start with (0,0.1)

0.1 = a•b^0

anything raised to zero is 1

0.1 = a * 1

a = 0.1

Now, we have a

Let us work with the second point to get b

The point is (1,0.05)

0.05 = 0.1•b^1

0.05 = 0.1b

b = 0.05/0.1

b = 0.5

Thus, we have the equation as;

y = 0.1•0.5^x

5 0
2 years ago
PLs help..............
34kurt

3/5 or 60% of the tank will be filled in an hour.

8 0
2 years ago
Read 2 more answers
a particular city had a population of 24,000 in 1900 and a population of 29,000 in 1920. Assuming that its population continues
DerKrebs [107]

Answer:

It will have a population of 61,779 in 2000.

Step-by-step explanation:

The population for the city, in t years after 1900, can be modeled by a exponential function with constant growth rate in the following format:

P(t) = P(0)(1+r)^{t}

In which P(0) is the population in 1900 and r is the growth rate.

Population of 24,000 in 1900

This means that P(0) = 24000

Population of 29,000 in 1920.

1920 is 1920 - 1900 = 20 years after 1900.

This means that P(20) = 29000. So

P(t) = P(0)(1+r)^{t}

29000 = 24000(1+r)^{20}

(1+r)^{20} = \frac{29000}{24000}

\sqrt[20]{(1+r)^{20}} = \sqrt[20]{\frac{29000}{24000}}

1 + r = 1.0095

So

P(t) = P(0)(1+r)^{t}

P(t) = 24000(1.0095)^{t}

What population will it have in 2000

2000 is 2000 - 1900 = 100 years after 1900. So this is P(100).

P(t) = 24000(1.0095)^{t}

P(100) = 24000(1.0095)^{100} = 61779

It will have a population of 61,779 in 2000.

4 0
3 years ago
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