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3 years ago

Help needed please

Mathematics

1 answer:

ycow [4]3 years ago

6 0

To change a fraction to a decimal all u do it divide the numerator by the denominator

to change a decimal to a percent you multiple it by 100

to change a percent to a decimal you divide it by 100

and to change a decimal back to a fraction you see what place the last digit of the decimal ends in (maybe tenths, hundredths, or thousandths place) and if it's tenths you put it over 10, if it's hundredths place then put it over 100 and ect.

but if it has whole numbers just write it out and ignore it // ex. 1.25= 1 25/100= 1 1/4

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suppose you know that over the last 10 years, the porbabiliy that your town would have at least one ma jor stor was 40%. describ

Anuta_ua [19.1K]

Answer:

The probability of a big storm is 40%.

Now, you can find a D10 (a die with 10 faces)

You can assign 4 numbers (0, 1, 2, 3) to the event "there is a major storm"

in this way, you have 40% of having a storm.

and the other 6 numbers (4, 5, 6, 7, 8, 9) to the event "there is not a major storm". This means that we have 60% of not having a storm.

now, when you roll the dice you can see if a year there will be a storm or not.

Now, you roll the dice 5 times (for the 5 years) and take note of the results and the number of storms in those 5 rolls.

Now do the same thing a bunch of times, at least 25 times.

Now, you recorded the results in each set of rolls, now see the number of sets that have at least years with storms.

Take that number and divide it by the total number of sets of data (in this case 25, for example)

The result is the probability that we are looking for.

6 0

3 years ago

When the angle of a join increases, it produces movement. witch type of movement is it?

atroni [7]

In the limbs, flexion decreases the angle between the bones (bending of the joint), while extension increases the angle and straightens the joint.

5 0

3 years ago

A number lies 12 units to the left of 0 on a number line. Which of the following describes the location of the opposite of the n

sergiy2304 [10]

12 units to the right of 0

5 0

3 years ago

The sum of the first two terms of an infinite GP is 6 and each term is 5 times the sum of the succeeding termsthen the second te

kozerog [31]

Answer:

$\dfrac{6}{7}$ .

Step-by-step explanation:

It is given that the sum of first two terms of an infinite GP is 6.

nth term of a GP is

$a_n=ar^{n-1}$

$a+ar=6$ ...(1)

Each term is 5 times the sum of the succeeding terms.

$a_n=5(a_{n+1}+a_{n+2}+...+\infty)$

$ar^{n-1}=5(ar^n+ar^{n+1}+...+\infty)$

$ar^{n-1}=5ar^n(1+r+r^2+...+\infty)$

Divide both sides by a.

$r^{n-1}=5r^n(\dfrac{1}{1-r})$ $[\text{Sum of infinite GP}=\dfrac{a}{1-r}]$

$\dfrac{r^n}{r}=\dfrac{5r^n}{1-r}$

$\dfrac{1}{r}=\dfrac{5}{1-r}$

$1-r=5r$

$1=6r$

$\dfrac{1}{6}=r$

The common ratio is 1/6.

Put r=1/6 in (1).

$a+a(\dfrac{1}{6})=6$

$6a+a=36$

$7a=36$

$a=\dfrac{36}{7}$

Second term $ar=\dfrac{36}{7}\times \dfrac{1}{6}=\dfrac{6}{7}$

Therefore, the second term is $\dfrac{6}{7}$ .

4 0

3 years ago

A rectangle has a perimeter of 12 x + 8y. If one side of the rectangle is 4x-2y, write expression of the other side.

Alona [7]

Answer:

The expression of the other side of the rectangle = 2x + 4y + 25

Step-by-step explanation:

The Perimeter of the rectangle is 12 x + 8y

The one side of the rectangle is 4x - 25

Let the other side of the rectangle be S

Now, the PERIMETER OF THE RECTANGLE = 2 ( SUM of BOTH SIDES)

⇒ 12 x + 8y = 2(S + (4x - 25))

or, 12 x + 8y = 2S + 8 x - 50

or, 12 x + 8y - 8x + 50 = 2S

⇒ 4x + 8y + 50 = 2S

or, S = 2x + 4y + 25

Hence, the expression of the other side of the rectangle = 2x + 4y + 25

8 0

3 years ago