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4 years ago

4 of 9 © Express the ratio below in its simplest form. 3.5:4.5

Mathematics

2 answers:

kaheart [24]4 years ago

8 0

I think it’s already in it’s simplest form. I think...

MariettaO [177]4 years ago

8 0

Answer:

7/9

Step-by-step explanation:

35/10:45/10=35/10*10/45=35/45=35:5/45:5=7/9

3.5/4.5=(3.5*2)/(4.5*2)=7/9

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There are 25 students performing in the holiday concert. Of the students, 11 are boys. What percent of the students are boy's? P

Mademuasel [1]

Divide 11 by 24 and you get 0.44
So 44% of the holiday concert are boys.

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3 years ago

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A random sample of 64 students at a university showed an average age of 20 years and a sample standard deviation of 4 years. The

adelina 88 [10]

Answer:

The 90% confidence level is $19.15< L < 20.85$

Step-by-step explanation:

From the question we are told that

The sample size is $n = 64$

The mean age is $\= x = 20 \ years$

The standard deviation is $\sigma = 4 \ years$

Generally the degree of freedom for this data set is mathematically represented as

$df = n - 1$

substituting values

$df = 64 - 1$

$df = 63$

Given that the level of confidence is 90% the significance level is mathematically evaluated as

$\alpha = 100 - 90$

$\alpha =$ 10 %

$\alpha = 0.10$

Now $\frac{\alpha }{2} = \frac{0.10}{2} = 0.05$

Since we are considering a on tail experiment

The critical value for half of this significance level at the calculated degree of freedom is obtained from the critical value table as

$t_{df, \frac{ \alpha}{2} } = t_{63, 0.05 } = 1.669$

The margin for error is mathematically represented as

$MOE = t_{df , \frac{\alpha }{2} } * \frac{\sigma}{\sqrt{n} }$

substituting values

$MOE = 1.699 * \frac{4 }{\sqrt{64} }$

$MOE = 0.85$

he 90% confidence interval for the true average age of all students in the university is evaluated as follows

$\= x - MOE < L < \= x + E$

substituting values

$20 - 0. 85 < L < 20 + 0.85$

$19.15< L < 20.85$

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3 years ago

When the town of Bradyville first started its voluntary recycling program, 1500 of the town’s residence participated. The town p

kirza4 [7]

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This is an example of an exponential equation.
These types of equations are in the form: y = ab^x

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All you have to do is put the pieces in place. Since it is a 15% increase, we are using 1.15 for the rate. And the starting value (a) is 1500.

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3 years ago

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Please find the radius and the circumference will give brainlyest

Ksju [112]

radius is 3, circumference is 18.85

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3 years ago

Season the Texans won 4 out of 12 games. What percent of games the Texans in last season?

Marizza181 [45]

Answer:

This question sounds incomplete

If you're asking for the percentage of the games they've won:

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3 years ago