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3 years ago

Write one way you can read the time. 6:20

Mathematics

1 answer:

pantera1 [17]3 years ago

8 0

<em><u>Answer:</u></em> Six hours and Twenty minutes.

<em><u>Step-by-step explanation: </u></em>The number before the : is the hours and the number after is the minutes, if you go even more in depth you will get to seconds and milliseconds.

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1) On a standardized aptitude test, scores are normally distributed with a mean of 100 and a standard deviation of 10. Find the

Musya8 [376]

Answer:

A) 34.13%

B) 15.87%

C) 95.44%

D) 97.72%

E) 49.87%

F) 0.13%

Step-by-step explanation:

To find the percent of scores that are between 90 and 100, we need to standardize 90 and 100 using the following equation:

$z=\frac{x-m}{s}$

Where m is the mean and s is the standard deviation. Then, 90 and 100 are equal to:

$z=\frac{90-100}{10}=-1\\ z=\frac{100-100}{10}=0$

So, the percent of scores that are between 90 and 100 can be calculated using the normal standard table as:

P( 90 < x < 100) = P(-1 < z < 0) = P(z < 0) - P(z < -1)

= 0.5 - 0.1587 = 0.3413

It means that the PERCENT of scores that are between 90 and 100 is 34.13%

At the same way, we can calculated the percentages of B, C, D, E and F as:

B) Over 110

$P( x > 110 ) = P( z>\frac{110-100}{10})=P(z>1) = 0.1587$

C) Between 80 and 120

$P( 80$

D) less than 80

$P( x < 80 ) = P( z$

E) Between 70 and 100

$P( 70$

F) More than 130

$P( x > 130 ) = P( z>\frac{130-100}{10})=P(z>3) = 0.0013$

8 0

3 years ago

URGENT I NEED HELP RIGHT NOW 5 STAR + BRAINLY

shusha [124]

48% is very close to 50%, which is known as one-half of something. One half of 200 is 100, so 48% is about 100 (actual is 96).

8 0

3 years ago

Read 2 more answers

There are two aircraft carriers, A and B, and the carrier A is longer in length the carrier B. The total length of these two car

Svetradugi [14.3K]

Answer:

<h3>Length of carrier A = 2096 feet</h3><h3> Length of carrier B=2082 feet.</h3>

Step-by-step explanation:

Given , two air craft carriers are A and B . The carrier A is longer than the carrier B in length.

Total length of two carriers =4178 feet

Difference of two carriers = 14 feet

Let

Length of carrier A =x feet

And

Legth of carrier B =y feet

According to question

The I equation is

x+y=4178

The II equation is

x-y= 14

Substitution method: In this method step I : we find value of x or y from the equation I

Step II: put the value of x or y in II equation then we get the value of another varaiable x or y

Step : Again put the obatined value of variable x or y from step II in equation I then we get value of other variable x or y .

By using substitution method ,

we find value of x from equation I

x= 4178-y

Now, put the value of x in equation II then we get

4178-y-y=14

4178-2y=14

4178-14=2y

4164=2y

$y=\frac{4164}{2}$

y= 2082

Again , put the value of y in equation I

2082 +x=4178

x= 4178-2082

x=2096

Hence, the length of carrier A = 2096 feet

The length of carrier B= 2082 feet

4 0

3 years ago

20. The value of y varies directly with x and the constant of variation is 7.

Serjik [45]

Drum role please..... it’s 7

6 0

3 years ago

Two numbers are in the ratio of 4:9. If the larger number is 35 more than the smaller number, then product of the number is?

kherson [118]

Answer:

1764

Step-by-step explanation:

Let x = small number

Let y = large number

Form 2 equations

x/y=4/9

y=x+35

x/(x+35)=4/9

x=4/9x+4/9(35)

x-4/9x=140/9

5/9x=140/9

x=28

y=28+35

y=63

product of 2 numbers

28x63=1764

5 0

3 years ago