All categories

3 years ago

Compute the standard deviation for the set of data.

Mathematics

2 answers:

mr Goodwill [35]3 years ago

5 0

answer is A

see attached picture

erastovalidia [21]3 years ago

5 0

Answer:

Step-by-step explanation:

You might be interested in

The band boosters collected $2400 from the sale of hamburgers and hotdogs.The amount earned from hamburgers and hotdogs were equ

mina [271]

400 Hamburgers
600 Hot dogs

Divide 2,400 by two because that's how many items they sold. You'll get 1,200.

Divide 1,200 by 3 because that's how much a hamburger costs and you'll end up with 400

Divide 1,200 by 2 because that's how much a hot dog costs and you'l end up with 600

To check, multiply 400x3 and 600x2

Then add the sums together- 1,200+1,200= 2,400

3 0

3 years ago

Read 2 more answers

8. For questions 8-9, determine whether the two figures are similar. If so, give the scale factor of the smaller figure to the l

Vinvika [58]

Question 8:

Your choice is correct: two figures are similar if all correspondant sides are in the same ratio.

In your case, the figure on the right have correspondant sides which are all three times the figure on the left, since

$12 = 4\times 3, 21 = 7\times 3, 54 = 18\times 3$

So, the two figures are similar and their ratio is 1:3.

Question 9:

We follow exactly the same approach: let's see if the radii and the heights are in the same ratio: the radii are in ratio

$\cfrac{3.2}{2} = 1.6 = \cfrac{16}{10} = \cfrac{8}{5}$

While the heights are in ratio

$\cfrac{6.4}{4} = 1.6 = \cfrac{16}{10} = \cfrac{8}{5}$

So, the answer is again yes, they are similar, and the ratio is 1.6.

8 0

3 years ago

Read 2 more answers

A lottery offers one $900 prize, one $600 Prize, three $400 prizes, and four $100 prizes. One thousand tickets are sold at $5 ea

kap26 [50]

Answer:

Expected value for 4 tickets = $ -7.6

Step-by-step explanation:

Given - A lottery offers one $900 prize, one $600 Prize, three $400 prizes, and four $100 prizes. One thousand tickets are sold at $5 each.

To find - Find the expectation if a person buys four tickets. Assume that the player's ticket is replaced after each draw and that the same ticket can win more than one prize. Round to two decimal places for currency problems.

Proof -

Given that,

A lottery offers

one $ 900 prize

one $ 600 prize

three $ 400 prizes

Four $ 100 prizes

And

One thousand tickets are sold at $ 5 each

Now,

If the person bought 1000 tickets then the prize he gets is

= 900 + 600 + 3×400 + 4×100

= 900 + 600 + 1200 + 400

= $3100

And

The cost of 1000 tickets = 5×1000 = $ 5000

Now,

Price 1 ticket = $\frac{3100}{1000}$ = $ 3.1

⇒Expectation of 1 ticket = $ 3.1 - 5 = $ -1.9 (Here $5 is price of 1 ticket)

⇒Expected value for 4 tickets = $ 4× -1.9 = $ -7.6

⇒Expected value for 4 tickets = $ -7.6

3 0

3 years ago

Select the correct answer.

viva [34]

Answer:

As the given equation represents a quadratic function.

Thus, $y\:=\:x^2-9x$ represents a function.

As we know that the function is just a relation in which each input has only one output.

Thus, $y\:=\:x^2-9x$ represents a relation and function.

Step-by-step explanation:

Given the equation

$y\:=\:x^2-9x$

As the given equation represents a quadratic function.

Thus, $y\:=\:x^2-9x$ represents a function.

As we know that the function is just a relation in which each input has only one output.

Thus, $y\:=\:x^2-9x$ represents a relation and function.

We know that the domain of a function is the set of input or argument values for which the function is real and defined.

$\mathrm{Domain\:of\:}\:x^2-9x\::\quad \begin{bmatrix}\mathrm{Solution:}\:&\:-\infty \:$

We also know that the range of a function is the set of values of the dependent variable for which a function is defined.

$\mathrm{Range\:of\:}x^2-9x:\quad \begin{bmatrix}\mathrm{Solution:}\:&\:f\left(x\right)\ge \:-\frac{81}{4}\:\\ \:\mathrm{Interval\:Notation:}&\:[-\frac{81}{4},\:\infty \:)\end{bmatrix}$

The graph is also attached below. From the graph, it is clear that it represents a Parabola.

6 0

3 years ago

The amount of gasoline at a gas station changes from 58,432.4 gallons to 56,475.2 gallons from 2 PM to 4 PM what rational number

gogolik [260]

Answer:

978.6

Step-by-step explanation:

change in gallons is 1957.2 over a period of 2 hours

change in gallons is 978.6 over a period of 1 hour

8 0

3 years ago