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3 years ago

The stock of Company A gained $0.72 throughout the day and ended at a value of $48.72. By what percentage did the stock rise?

Mathematics

2 answers:

Nadya [2.5K]3 years ago

8 0

$48

Your subtract the first number from the second number and get the value.

iren2701 [21]3 years ago

4 0

Answer:

1.5%

Step-by-step explanation:

48.72 - 0.72 = 48.00

48(1+r)/48 = 48.72/48

1+r= 1.015 subtract one

r= 0.015 multiply by 100

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Thickness measurement ancient prehistoric Native American Pot Shards discovered in Hopi Village are approximately normally distr

beks73 [17]

Answer:

a) $P(X$

And we can find this probability using the normal standard table and we got:

$P(z$

b) $P(X>7)=P(\frac{X-\mu}{\sigma}>\frac{7-\mu}{\sigma})=P(Z>\frac{7-5.1}{0.9})=P(z>2.11)$

And we can find this probability using the complement rule and the normal standard table and we got:

$P(z>2.11)=1-P(Z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the variable of interest of a population, and for this case we know the distribution for X is given by:

$X \sim N(5.1,0.9)$

Where $\mu=5.1$ and $\sigma=0.9$

Part a

We are interested on this probability

$P(X$

And the best way to solve this problem is using the normal standard distribution and the z score given by:

$z=\frac{x-\mu}{\sigma}$

If we apply this formula to our probability we got this:

$P(X$

And we can find this probability using the normal standard table and we got:

$P(z$

Part b

We are interested on this probability

$P(X>7)$

And the best way to solve this problem is using the normal standard distribution and the z score given by:

$z=\frac{x-\mu}{\sigma}$

If we apply this formula to our probability we got this:

$P(X>7)=P(\frac{X-\mu}{\sigma}>\frac{7-\mu}{\sigma})=P(Z>\frac{7-5.1}{0.9})=P(z>2.11)$

And we can find this probability using the complement rule and the normal standard table and we got:

$P(z>2.11)=1-P(Z$

4 0

3 years ago

Question 8 Multiple Choice Worth 1 points)

Anon25 [30]

Answer:

$\dfrac{x}{2}+12=36$

Step-by-step explanation:

As it is given that

Both Riley and Francesca commute to work.

And, the Riley takes 12 minutes more than as Francesca as Riley takes 36 minutes

So for determining how many minutes is required for Francesca to get to work we need

Let us assume the time taken by Francesca to get to work is x

So, the time taken by Riley is

$= \dfrac{x}{2}+12$

And, Riley takes 36 minutes to get to work.

So, the equation would be

$\dfrac{x}{2}+12=36$

5 0

3 years ago

Amy and Laura recorded the average gas mileage of their vehicles each week for four weeks. What can we concluded about the relat

Assoli18 [71]

there is no table shown

4 0

3 years ago

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Lovell decorates reclaimed shorts and sells them. She pays $420 per month in rent and $21 in expenses for each pair of shorts. S

kirill [66]

Answer: 30 pairs of shorts

21x+420=35x
subtract 21x from both sides of the equation.
420=14x
get rid of the x by division
420/14
you get 30 =x

8 0

3 years ago

The smaller triangle was dilated to form the larger triangle. What is the value of x? A smaller triangle has side lengths of 5,

riadik2000 [5.3K]

Answer:

x = 7.5

Step-by-step explanation:

Dilation is a transformation in which the size of a given figure is either increased or decreased by a scale factor.

Given that the length of sides of the smaller triangle are; 5, 13, 12.

Given also that the length of the dilated triangle are; x, blank, 18.

Comparing the length of the last sides of the two triangles, we have;

(scale factor x 12) + 12

= ( $\frac{1}{2}$ x 12) + 12

= 6 + 12

= 18

Thus the scale factor for the dilation is $\frac{1}{2}$ . So that:

x = ( $\frac{1}{2}$ x 5) + 5

= 2.5 + 5

= 7.5

x = 7.5

And also,

blank = ( $\frac{1}{2}$ x 13) + 13

= 6.5 + 13

blank = 19.5

Therefore, the length of the sides of dilated triangle are: 7.5, 19.5, 18

4 0

3 years ago

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