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Paha777 [63]
3 years ago
11

30 Points! please help!

Mathematics
1 answer:
SVEN [57.7K]3 years ago
3 0

Answer:

18) 4 * 10 ^ -10

19) t ^ 9

Step-by-step explanation:

18. When multiplying in scientific notation, just multiply the regular numbers together and add the exponents for the tens.

So it'll be 40 * 10^-11

However, the beginning number should have the decimal right after the 4, not any place after (for example, it's 3.056, not 30.56 or 3056.)

To fix this, move the decimal place forward one space from 40. to 4.0, and add 1 to the -11 power.

So the answer is now 4 * 10^-10

19. When dividing exponents, if the base number is the same, you can divide. (Basically, you can not divide x^2 and y^3 because x and y aren't the same)

Since in this case it's t, you can divide.

Dividing exponents is simple: just subtract them.

14 - 5 = 9

so the answer is t ^ 9

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zalisa [80]

The confidence interval formula is computed by:

Xbar ± Z s/ sqrt (n)

Where:

Xbar is the mean

Z is the z value

S is the standard deviation

N is the number of samples

 

So our given are:

90% confidence interval with a z value of 1.645

Sample size 40, 45

Mean 180, 179

Standard deviation 2, 4

 

So plugging that information in the data will give us a confidence interval:

For 1:

Xbar ± Z s/ sqrt (n)

= 180 ± 1.645 (2 / sqrt (40))

= 180 ± 1.645 (0.316227766)

= 180 ± 0.520194675

= 179.48, 180.52

For 2:

Xbar ± Z s/ sqrt (n)

= 179 ± 1.645 (4 / sqrt (45))

<span>= 179 ± 1.645 (0.596284794)</span>

therefore, the answer is letter b

8 0
3 years ago
PLEASE I NEED HELP ASAP
zysi [14]

Answer:

option C is the correct ans..

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A function f from A to B is a relation from A to B which assosciates each element of A to a unique element of B..

Option C fulfills all the case.So,C is the correct ans..

8 0
3 years ago
What is the solution set for 6x−9=15, given the replacement set {0, 1, 2, 3, 4}?
vfiekz [6]
6x-9=15
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Therefore the answer is A.

Hope this helps :)
6 0
3 years ago
Read 2 more answers
Como faz esta conta 6-4x=-20-10x
yulyashka [42]
6-4x=20-10x, 2+20=-10x+4x, x=26/-6
4 0
3 years ago
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What is the greatest common multiple of 9 and 27
dusya [7]

Hi,

The greatest common multiple of 9 and 27 is 9

<em>explanations</em><em>:</em>

9 x 1 = 9

9 x 3 = 27

✅;-)

6 0
2 years ago
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