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3 years ago

12

Hi can you help !!!???

2 answers:

GalinKa [24]3 years ago

5 0

Answer:

C

Step-by-step explanation:

4 1/3 can be separated into 4, and 1/3.

half of 4 is 2.

Half of 1/3 is 1/6.

Add 2 and 1/6, and you get 2 and 1/6. Answer is C

inn [45]3 years ago

5 0

Answer:

$2 \frac{1}{6}$

Step-by-step explanation:

$4 \frac{1}{3}$

covert back

$\frac{13}{3}$

multiply by 1/2 to get answer

$\frac{13}{3} \times \frac{1}{2 } = \frac{13}{6}$

simplify

$\frac{13}{6} = 2 \frac{1}{6}$

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Question Help Scores of an IQ test have a bell-shaped distribution with a mean of 100100 and a standard deviation of 1010. Use

3241004551 [841]

Answer:

a) 95% percentage of people has an IQ score between 80 and 120.

b) 68% percentage of people has an IQ score between 90 and 110.

c) 2.5% percentage of people has an IQ score greater than 120.

Step-by-step explanation:

The empirical formula states that:

The empirical rule is known as the three-sigma rule or 68-95-99.7 rule.
It is a rule which states that for a normal distribution, almost all data falls within three standard deviations of the mean.
68% of data falls within the first standard deviation that is $\mu \pm \sigma$

95% of data falls within the second standard deviation that is $\mu \pm 2\sigma$

99.7% of data falls within the third standard deviation that is $\mu \pm 3\sigma$

a) percentage of people has an IQ score between 80 and 120

(80, 120) can be written as:

$(80, 120) = (100-2(10), 100 + 2(10))\\= (\mu \pm 2\sigma)$

Thus, it is the interval within two standard deviation from the mean.

Thus, by empirical formula, 95% percentage of people has an IQ score between 80 and 120.

b) percentage of people has an IQ score between 90 and 110

(90, 110) can be written as:

$(90, 110) = (100-1(10), 100 + 1(10))\\= (\mu \pm 1\sigma)$

Thus, it is the interval within one standard deviation from the mean.

Thus, by empirical formula, 68% percentage of people has an IQ score between 90 and 110.

c) P(score greater than 120)

= 1 - percentage of score less than 80 - percentage of score between 80 and 120

$= 1 - (95\% + 2.5\%) = 2.5\%$

From empirical formula,

2.5% percentage of people has an IQ score greater than 120.

6 0

3 years ago

$976 and 25% intrest for 4 years

tatuchka [14]

Answer:

<h3>1952.00</h3><h3>I=976</h3>

Step-by-step explanation:

<u><em>SIMPLE INTEREST FORMULA:</em></u>

I- Interest

P- Principal

R- Rate

T-Time

P=976

R=25

T=4 years

976*25%4

25%=0.25

Solve.

Multiply.

976*0.25*4

976*0.25*4=976

I=976

976 and $1952.00, which is our answer.

7 0

4 years ago

Find the product of the roots of the equation<br> xl-5x - 36 = 0

Marat540 [252]

Answer:

Step-by-step explanation:

Hello, I assume that you mean

$x^2-5x-36$

The product is -36.

$x_1 \text{ and } x_2 \text{ are the two roots, we can write}\\\\(x-x_1)(x-x_2)=x^2-(x_1+x_2)x+x_1\cdot x_2$

So in this example, it means that the sum is 5 and the product is -36.

Thank you

5 0

4 years ago

James is reading a book that is 1400 pages he will read the same number of pages each day if he reads the book in 7 days how man

Novay_Z [31]

He will read 200 pages a day.

7 0

3 years ago

Read 2 more answers

Rewrite the fractions 3/4 and 5/16 as fractions with a least common denominator.

nata0808 [166]

Answer:

12/16 and 5/16

Step-by-step explanation:

We are given two fractions with denominator 4 and 16.

To find the least common denominator, of 4 and 16.

Factorise 4 and 16.

4 = 2x2

16 = 2x2x2x2

i.e. 4 divides 16.

Hence Least common denominator = bigger number = 16

Make the given fractions to equivalent fractions with common denominator 16.

3/4 = 4(3)/4(4) = 12/16 and

5/16 = 1(5)/16(1)= 5/16

Hence answer would be

12/16 and 5/16

6 0

3 years ago

Read 2 more answers