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3 years ago

Can someone help me with this? Please and thank you!

Mathematics

1 answer:

sergiy2304 [10]3 years ago

5 0

Answer:

She should find the squares between 4.2 and 4.3

Step-by-step explanation:

The square of 4.2 was too low and the square for 4.3 was too high so the answer is between the two.

You might be interested in

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

Please helppp meeeeeeee

natka813 [3]

Answer:

i dont know if this is right but i think that would be the second one

Step-by-step explanation:

i dont know if this is right but i think that would be the second one

3 0

3 years ago

During a jump, a sky diver reaches terminal velocity. Which forces are in effect during a sky dive, and are they balanced or unb

neonofarm [45]

Answer:

1.) Unbalanced

Step-by-step explanation:

have a great day

5 0

3 years ago

Read 2 more answers

Marcel and Floyd are playing games at an arcade. Marcel has $8.25 and is only playing $0.25 games. Floyd has $9.75 and is only p

artcher [175]

Answer:

the error is in step 2.

0.25x was added to -0.75x with an incorrect result of +0.50x.

Step-by-step explanation:

The incorrect step is ...

Step 2: negative 1.50 = 0.50 x

This is the result of an attempt to add 0.25x to both sides of the equation. The correct step would be ...

-1.50 -0.25x = -0.75x . . . . . . . result from Step 1

-1.50 -0.25x +0.25x = -0.75x +0.25x . . . . . add 0.25x to both sides

-1.50 = -0.50x . . . . . . . . . . . . . the correct result from the addition (Step 2)

The correct result is ...

x = -1.50/-0.50 = 3 . . . . . Step 3

7 0

3 years ago

Read 2 more answers

Sid intended to type a seven-digit number, but the two 3's he meant to type did not appear. What appeared instead was the five-d

Papessa [141]

Answer:

21 ways

Step-by-step explanation:

number = 7 digit

5 digit no = 52115

to find out

How many different seven-digit numbers

solution

first we need to place the two missing 3s in the number 52115

we consider here two cases

case 1 the two 3's appear separated (like 532135 or 3521135)

case 2 the two 3's appear together (like 5332115 or 5211533)

Case 1 we can see that number type as _5_2_1_1_5_

place 3's placeholders show potential locations

( type a ) for 3's separated we will select 2 of 6 place and place 3 in every location so we do this 6C2 = (15) ways

and (type b): again use same step as _5_2_1_1_5_

here 3s together for criterion and we will select 1 of the 6 place and place both 3s here and there are 6 ways.

so that here will be 15+6=21 ways

If 3 and 3 are separate so 6C2 = 15 ways

If 3 and 3 are together so there = 6 ways

= 15 + 6 = 21 ways

8 0

3 years ago