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PSYCHO15rus [73]

3 years ago

12

A rectangular board is 1300 millimeters long and 900 millimeters wide. What is the area of the board in square meters? Do not ro

und!

2 answers:

alexdok [17]3 years ago

5 0

1300 mm = 1.3 m

900 mm = 0.9 m

Area

1.3 * 0.9 = 1.17 m²

harina [27]3 years ago

4 0

Since the answer asks for meters, let's convert to meters right at the start. There are 1000 millimeters in 1 meter, we can convert the dimensions:

Length: $\frac{1300}{1000} =1.3m$

Width: $\frac{900}{1000}=0.9m$

So to find the area of the board, we will use the equation: $A=l*w$

$A=1.3*0.9$

$A=1.17 m^{2}$

So now we know that the area of the board is $1.17m^{2}$ .

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FromTheMoon [43]

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goblinko [34]

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Step-by-step explanation:

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2 years ago

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

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

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

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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

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3 years ago

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kow [346]

Step-by-step explanation:

in my opinion

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2 years ago

PLEASE HELP ASAP f(x) = x2 What is g(x)?

vfiekz [6]

Answer:

c. g(x) = 4x^2

Step-by-step explanation:

From a first glance, since g(x), is skinnier than f(x), meaning that it is increasing faster, so I know that I can eliminate options A & B since the coefficient on x needs to be greater than 1.

We can then look and see that g(1) = 4 as shown by the point given to us on the graph.

To find the right answer we can find g(1) for options C & D and whichever one matches the point on the graph is our correct answer. e

Option C:

once we plug in 1 for x, our equation looks like

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1^2 = 1, and 4(1) = 4,

so g(1) = 4. and our point is (1,4).

This is the same as the graph so this is the CORRECT answer.

If you want to double check, you can still find g(1) for option D and verify that it is the WRONG answer.

Option D:

once we plug in 1 for x, our equation looks like

16(1)^2

1^2 = 1, and 16(1) = 16,

so g(1) = 16. and our point is (1,16).

This is different than the graph so this is the WRONG answer.

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2 years ago