3 years ago

Write the whole number 250 as a fraction that equals 1

Mathematics

2 answers:

nadezda [96]3 years ago

4 0

The answer will be 250/250

ad-work [718]3 years ago

3 0

Answer:

250/250

Step-by-step explanation:

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Suppose we want a 90% confidence interval for the average amount spent on entertainment (movies, concerts, dates, etc.) by fresh

katovenus [111]

Answer:

609

Step-by-step explanation:

Standard deviation = $\sigma$ = $30

Margin of error = E = $2

Confidence level = 90%

Since the distribution is said to be normal, we will use z scores to solve this problem.

The z score for 90% confidence level = z = 1.645

Sample size= n = ?

The formula to calculate the margin of error is:

$E=z\frac{\sigma}{\sqrt{n}}\\\\\sqrt{n}=z\frac{\sigma}{E}\\\\n=(\frac{z\sigma}{E} )^{2}$

Using the values in above equation, we get:

$n=(\frac{1.645 \times 30}{2} )^{2}\\\\ n = 608.9$

This means, the minimum number of observations required is 609

6 0

3 years ago

in parallelogram ABCD, AC is diagonal, the measure <ABC is 40°, and the measure of <ACD IS 57°. what is the measure of &lt

Nutka1998 [239]

Answer: $\angle CAD = 83^\circ$ Option D

Step-by-step explanation:

In this question we use properties of parallelogram and angle sum property of a triangle.

In parallelogram ABCD

$\angle ABC=40^\circ$

As, we know that opposite angles of parallelogram are equal

Therefore,

$\angle ABC =\angle ADC =40^\circ$

Now, in triangle ADC

We know that sum of all the angles of a triangle is $=180^\circ$

$\angle ACD +\angle ADC +\angle DAC =180^\circ$

$57^\circ +40^\circ +\angle DAC =180^\circ$

$97^\circ + \angle DAC = 180^\circ$

Subtracting 97 from both sides we get

$\angle DAC = 180^\circ - 97^\circ$

$\angle DAC = 83^\circ$

Measure of $\angle CAD = 83^\circ$

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3 years ago

Which equation shows y=−12x+4 in standard form?

Tema [17]

The answer is the first option

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2 years ago

an electric wire which is 0.12 m long is cut into 3 pieces of the same length.How long is each pieces?

grigory [225]

Answer:

0.04m

Step-by-step explanation:

0.12/3=0.04

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3 years ago

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I know the answer but I need help doing the equation!!! 10 points!!!! Help!!!!

Brums [2.3K]

Answer: Here x = 9. This is the correct answer. Hooe it helps

Step-by-step explanation:

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2 years ago

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