please help me I need to learn how to do this

Answer:

-2

Step-by-step explanation:

took the test

Answer:

I think its C

Step-by-step explanation:

Answer:

P [ 40000 ≤ X ≤ 45000 ] =  0,02773    or  2,8 %

Step-by-step explanation:

P [ 40000 ≤ X ≤ 45000 ]  = ?

To find the probablity    P [ X ≤ 40000 ] =  ?

z(s)  = ( X - x ) / σ

z(s)= ( 40000 - 6000 )/ 8300

z(s) =  -20000/8300

z(s) ≈  - 2,41

Then

from z-table we find P [ X ≤ 40000] =  0,00820

Now again:

For  P [ X ≤ 45000 ]

z₂  = ( X - x ) / σ

z₂ =  ( 45000 - 6000 ) / 8300

z₂ = - 15000 / 8300

z₂ = - 1,8072

z₂ ≈ 1,81

From z - table

For  P [ X ≤ 45000 ] =   0,03593

Then:

P [ 40000 ≤ X ≤ 45000 ] = 0,03593 - 0,00820

P [ 40000 ≤ X ≤ 45000 ] =  0,02773    or  2,8 %

Answer:

y = 60°

x = 12

Step-by-step explanation:

Because all sets of opposite sides are parallel, opposite angles are equal, and  opposite sides have the same length.

Given dimensions:

x=31 feet, y= 24 feet and z= 95 feet

We can split the shape above into 3 components: A, B, and C

To find the total area, we will find the sum of the areas of each component

For A

The shape of A is that of a semi-circle.

The area of a semi-circle is given to be

The radius will be the diameter divided by 2

y= diameter

r= radius = y/2

r=24/2 =12 feet

pi=3.14

For B

The shape is a rectangle

The area of a rectangle is given by

A = l x b

where l = 31 and b = 24

Area = 31 x 24

Area = 744 square feet

For C

The shape is a triangle

The area of the triangle is given by

base = 64 feet, height = 24 feet

The total area is

22

Answer:  would be about 2000

Answer:

When an outline exists.

Step-by-step explanation:

As compared to the range, the interquatile range is somewhat resistant to the outliers. This is because the interquartile range itself is not always affected by the outliers if they lie at both ends of the data sets.

The IQR only describes the range of the middle 50% of the values in a data set, which is calculated as the difference between the 75th and 25th percentile values.

It also helps in the identification of these outliers using mild outliers being those values lower than the 25th quartile minus 1.5×IQR, or those values greater than the 75th quartile plus 1.5×IQR.

Given:

1 set requires 4 couples 8 dancers.

Total number of people at a square dance = 250.

To find:

The greatest number of sets possible at the dance.

Solution:

We have,

Total people = 250

1 set = 8 people.

\(\text{Number of possible sets}=\dfrac{\text{Total people}}{\text{People required for 1 set}}\)

\(\text{Number of possible sets}=\dfrac{250}{8}\)

\(\text{Number of possible sets}=31.25\)

Number of possible sets cannot be a decimal or fraction value. So, approx. the value to the preceding integer.

\(\text{Number of possible sets}\approx 31\)

Therefore, the number of possible sets at the dance is 31.

The pairs of events, A and B, that are disjoint include option A and B.

It should be noted that disjoint events simony means the events that are mutually exclusive as they can't occur at the same time.

For option A, because a person can be either male or female but not both, events A and B are disjoint.

For B, because the person already earns more than $100,000, events A and B are not disjoint.

For C, because the sum of two dice cannot be three when one die is three, events A and B are disjoint.

Therefore, A and C are disjoint.

Learn more about events on:

https://brainly.com/question/28565577

#SPJ1

Complete question

Which of the following pairs of events, A and B, are disjoint?

(a) A person is selected at random. A is the event "sex of the person selected is male" and B is the event "sex of the person selected is female."

disjoint / not disjoint

(b) A person is selected at random. A is the event "the person selected earns more than $100,000 per year" and B is the event "the person selected earns more than $250,000 per year."

disjoint / not disjoint

(c) A pair of dice are tossed. A is the event "one of the dice is a 3" and B is the event "the sum of the two dice is 3."

disjoint / not disjoint

Answer:

Given:

1 mile = 1.6 km

So, to find how many miles are in 100 km, we need to divide 100km by 1.6km because one single mile contains 1.6km.

100km/1.6km = 62.5 miles

Answer: 129 minutes in total

Step-by-step explanation:

1 2/5 hours in decimal form 1.4 hours

1.4 hours = 84 minutes

84 + 45 = 129 minutes

In a hexagonal-close-pack (HCP) unit cell, the ratio of lattice points to octahedral holes to tetrahedral holes =  1 : 1 : 2 is AB3

let the :

Number of lattice point = 1x.

Number of octahedral points = 1x

Number of tetrahedral  points = 2x

If anions occupy the HCP lattice points and cations occupy half of the octahedral holes.

Number of anions occupying the HCP lattice points, A= 1x

Number of cations occupying the octahedral points, B =  1x

The formula of the compound will be =

If anions occupy the HCP lattice points and cations occupy all of  the octahedral and the tetrahedral holes.

Number of anions occupying the HCP lattice points, A= 1x

Number of cations occupying the octahedral points, B =  x

Number of cations occupying the tetrahedral points, B =  2x

total number of cations = x + 2x = 3x

The formula of the compound will be = AB3

learn more about of compound here

https://brainly.com/question/14250657

#SPJ4

PMA = 37

CMT =  101 - 54 =47

Total = 37 + 47 = 84

Answer: A. 84

Using central angle theorem,

The measure of the arc BC = 110°.

An angle with its vertex in the middle of the circle it creates with its two radii is said to be central.

Here in the question,

As per the central angle theorem:

(2x -30) ° + x° = 180°

⇒ 2x - 30 + x = 180

⇒ 3x - 30 = 180

Adding 30 on both sides:

⇒ 3x = 180 + 30

⇒ 3x = 210

Dividing both sides by 3.

⇒ x = 70°

Now BC = 2x-30

= 2 × 70 -30

= 140 - 30

= 110°

Therefore, the measure of BC = 110°.

To know more about central angle, visit:

https://brainly.com/question/15698342

#SPJ1

The triangles ABC and DBE are similar by the SAS similarity theorem

The measure of the side lengths AC is 16 units

From the question, we have the following parameters that can be used in our computation:

The triangles ABC and DBE

These triangles have the following measures

This means that the triangles are similar by the SAS similarity theorem

Using the SAS similarity theorem, we have the following equation

(x + 1)/12 = (x + 5)/15

Cross multiply the equation

15x + 15 = 12x + 60

So, we have

3x = 45

Divide by 3

x = 15

This means that

x + 1 = 15 + 1 = 16

x + 5 = 15 + 5 = 20

Hence, the measure of the side lengths are 16 and 20 units

Read more about similar triangles at

https://brainly.com/question/14285697

#SPJ1

The correct answer is B. The sample represents a proportion of the population.

A point estimate is a single value used to estimate a population's unknown parameter. The sample proportion (denoted by p), in the context of determining the population proportion, is a widely used point estimate. The sample proportion is determined by dividing the sample's success rate by the sample size.

The sample must be representative of the population for it to be a reliable point estimate of the population proportion. To accurately reflect the proportions of various groups or categories present in the population, the sample should be chosen at random.

Learn more about population:https://brainly.com/question/30324262

#SPJ1

Answer = -91

step by step explanation

Step-by-step explanation:

N:2 = 15:5

N\2 = 15\ 5

Now cross multiply,

5N = 30

N = 6

Answer:

Step-by-step explanation:

N:2 = 15/5 solve it for n

n : 2 = 15 : 5

n = 2 * 15 : 5

n = 30 : 5

n = 6

---------------------

check

6 : 2 = 15 : 5

3 = 3

the answer is good

\(~~~~~~ \textit{Simple Interest Earned} \\\\ I = Prt\qquad \begin{cases} I=\textit{interest earned}\dotfill &\$45\\ P=\textit{original amount deposited}\dotfill & \$570\\ r=rate\to r\%\to \frac{r}{100}\\ t=months\dotfill &9 \end{cases} \\\\\\ 45 = (570)(\frac{r}{100})(9)\implies \cfrac{45}{(570)(9)}=\cfrac{r}{100}\implies \cfrac{1}{114}=\cfrac{r}{100} \\\\\\ \cfrac{100}{114}=r\implies \stackrel{\%}{0.88}\approx r\)

Considering the given equations for revenue and cost, the company will break-even when 356 widgets are sold.

The break-even point is the value of x for which:

R(x) = C(x).

In this problem, the functions are:

Hence:

R(x) = C(x)

16x = 12x + 1424

4x = 1424

x = 1424/4

x = 356

The company will break-even when 356 widgets are sold.

More can be learned about the break-even point of a company at https://brainly.com/question/9212451

#SPJ1

Step 1

Now we need to make our denominators match.

6 goes into 3 evenly, so we only need to multiply one term to get a common denominator.

Multiply 2 by 2, and get 4, then we multiply 3 by 2 and get 6.

We now have a new problem, that looks like this:  4/6+4/6

Step 2

Since our denominators match, we can add the numerators.

4 + 4 = 8

That gives us the sum, which is 8/6

Step 3

Now, do we need to simplify this fraction?

First, we attempt to divide it by 2...

Are both the numerator and the denominator evenly divisible by 2? Yes! So we reduce it:

8/6÷ 2 = 4/3

Let's try dividing by that again...

Nope! So now we try the next greatest prime number, 3...

Nope! So now we try the next greatest prime number, 5...

No good. 5 is larger than 4. So we're done reducing.

There you have it! Here's the final answer to 2/3 + 4/6

Answer:

d=1.3t

Step-by-step explanation:

In the equation,

Distance = 1.3 times time (in seconds.)

Answer:

6.5

Step-by-step explanation:

1.3x5=6.5

brwainliest plz

Answer:

Haha this isn't college  Alyssa fills 5 pitchers.  4.5 divided by the liters of lemonade(0.9) equals 5 pitchers because 9x5=45 so, 4.5 liters of lemonade divided by 0.9 liters equals 5 pitchers.

Step-by-step explanation:

Answer:

C) Return a rental item kept out thirteen days past the due date.

Step-by-step explanation:

Right on edge2020

All rentals are due back by midnight of the due date as printed on the transaction receipt.  Any rental not received by midnight on the day it is due is subject to a late charge of $1.50 for each day it is late. Any rental not returned by the fifth day after the due date will be transferred to a sale.  The Customer will then be required to pay the purchase price of the item in addition to five (5) days of late fees. The Customer will not be required to return the product once the total balance is paid.

According the rental agreement, Returning a rental item kept out thirteen days past the due date is not a responsibility of the customer.

These are all the responsibilities expected of the consumer when they do not follow due process. Returning the rental after 13 days is not a responsibility here.

Read more on responsibility of customers here:

https://brainly.com/question/390617

Answer:

\(f + e + d = 360^o\)

Step-by-step explanation:

The question is incomplete, as what is required is not stated and the triangle is not given.

So, I will solve generally.

The proof is as follows (see attachment for triangle)

From the attachment, we have:

\(a + f = 180\)

\(b + e = 180\)

\(c + d = 180\)

Make f, e and d the subject

\(f = 180 - a\)

\(e = 180 - b\)

\(d = 180 - c\)

Add up the equations

\(f + e + d = 180 -a + 180 - b + 180- c\)

Collect like terms

\(f + e + d = 180 + 180+ 180-a- b - c\)

\(f + e + d = 540-a- b - c\)

We have:

\(f + e + d = 540-(a+ b + c)\)

\(a + b + c \to 180\) --- angles in a triangle

So, we have:

\(f + e + d = 540-180\)

\(f + e + d = 360^o\) --- proved

Answer: The equation for the decrease in water is given by:

W = -0.414t + 129.549

To find after about how many minutes the water level would be less than or equal to 64 cups, we can set W to 64 and solve for t:

64 = -0.414t + 129.549

-65.549 = -0.414t

t = 158.1

Rounding to the nearest 10 minutes, we get:

t = 160

Therefore, after about 160 minutes, the water level would be less than or equal to 64 cups.

Regarding the values of a and b, we can see that they are not relevant to this problem since they are not given in the equation for the decrease in water. So, none of the given options is correct.

Step-by-step explanation:

The pattern is empty the second pail, leaving the first and third pail full and the fourth and sixth pails empty.

Given that, there are 6 pails in a row. The first 3 pails are filled with water.

The easiest way to solve this problem is to empty the second pail, leaving the first and third pail full and the fourth and sixth pails empty. This will create the desired pattern of full, empty, full, empty, full, empty.

Therefore, empty the second pail, leaving the first and third pail full and the fourth and sixth pails empty.

Learn more about the pattern here:

https://brainly.com/question/23136125.

#SPJ1

y=2x²+4x+4 and y=3x²+6x+9 are two instances for the provided standard form, y=ax²+bx+c.

In its most basic form, an equation is a mathematical statement that indicates that two mathematical expressions are equal. 3x + 5 = 14, for example, is an equation in which 3x + 5 and 14 are two expressions separated by a 'equal' sign. A condition on a variable (or variables) such that two expressions in the variable (variables) have equal value is referred to as an equation. • The solution or root of the equation is the value of the variable for which the equation is fulfilled.

Here,

given standard form,

y=ax²+bx+c

examples of this,

y=2x²+4x+4

y=3x²+6x+9

The 2 examples for given standard form, y=ax²+bx+c is y=2x²+4x+4 and y=3x²+6x+9.

To know more about equation,

https://brainly.com/question/26062761

#SPJ1

Answer:

decimal; 0.748 fraction is: 374/5 or 74 4/5 .