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3 years ago

Minh wrote the following number sentence 2.6 + 0.33= 59. Use estimation to show that Minh's answer is incorrect.

1 answer:

3 0

2.6 rounds to 3, and 0.33 would round to 0.50. Adding 3 and 0.50 together would equal to 3.50. 59 and 3.50 are no where near to each other which concludes Minh is incorrect.
(Please mark me brainliest)

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(5+3) • 5-3/8-3•2 help me

user100 [1]

Answer:

79.25

Step-by-step explanation:

8*5=40

40-3/8=39.625

39.625*2=79.25

Hope this helps

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3 years ago

Read 2 more answers

Help I need this quick

luda_lava [24]

Area of the 2 end triangles plus area of the 2 rectangular sides plus the area of the bottom rectangle

2 end Triangles
=2x(1/2bh)
=2x1/2x4x6
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Bottom rectangle
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3 years ago

A potter is creating a design for a red-colored urn. He starts with the design shown on the coordinate grid.

ololo11 [35]

Answer:Diagram is attached.

Step-by-step explanation:

When a point is rotated about the x axis the new point is at an equal distance from the point of rotation.

The given Urn (red) is rotated along the line x=1 .The rotated points will be at equal distance from the line x=1.In the figure the blue Urn is the rotated figure about the line x=1.

The coordinates of the points are mentioned in the diagram attached .In the rotated figire the y values remains same while for x coordinateis of the point at the same disstane from line x=1 .

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3 years ago

Kaira's gross pay is $4,633. Her deductions total $1,009.13. What percent of hergross pay is take-home pay?Round to the nearest

Delvig [45]

Answer:

$\text{ 78\%}$

Explanation:

Here, we want to get the percentage of the gross pay is the take-home pay

Mathematically, we have to divide the take-home pay by the gross pay and multiply it by 100%

Her take-home pay is the difference between her gross pay and her deductions

We have this as:

$\text{ 4633 - 1009.13 = \$3,623.87}$

We have this as:

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7 0

1 year ago

Suppose an article reported that 16% of unmarried couples in the United States are mixed racially or ethnically. Consider the po

makkiz [27]

Answer:

39.36% probability that the proportion of couples in the sample who are racially or ethnically mixed will be greater than 0.17.

Step-by-step explanation:

For each couple, there are only two possible outcomes. Either they are mixed racially or ethnically, or they are not. This means that the binomial probability distribution is used to solve this problem.

However, we are working with samples that are considerably big. So i am going to aproximate this binomial distribution to the normal.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

The expected value of the binomial distribution is:

$E(X) = np$

The standard deviation of the binomial distribution is:

$\sqrt{V(X)} = \sqrt{np(1-p)}$

Normal probability distribution

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

When we are approximating a binomial distribution to a normal one, we have that $\mu = E(X)$ , $\sigma = \sqrt{V(X)}$ .

In this problem, we have that:

$n = 100, p = 0.16$

$E(X) = 100*0.16 = 16$

$\sqrt{Var(X)} = \sqrt{100*0.16*0.84} = 3.67$

When n = 100, what is the probability that the proportion of couples in the sample who are racially or ethnically mixed will be greater than 0.17?

This is 1 subtracted by the pvalue of Z when $X = 100*0.17 = 17$ . So:

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{17 - 16}{3.67}$

$Z = 0.27$

$Z = 0.27$ has a pvalue of 0.6064.

So there is a 1-0.6064 = 0.3936 = 39.36% probability that the proportion of couples in the sample who are racially or ethnically mixed will be greater than 0.17.

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3 years ago