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Mamont248 [21]
3 years ago
5

HELP MEEEEEEEEEEEEE PLZZZZZZZZZZZZ

Mathematics
2 answers:
Leona [35]3 years ago
7 0

Let's say we wanted to subtract these measurements.

We can do the calculation exactly:

45.367 - 43.43 = 1.937

But let's take the idea that measurements were rounded to that last decimal place.  

So 45.367 might be as small as 45.3665 or as large as 45.3675.

Similarly 43.43 might be as small as 43.425 or as large as 43.435.

So our difference may be as large as

45.3675 - 43.425 = 1.9425

or as small as

45.3665 - 43.435 = 1.9315


If we express our answer as  1.937 that means we're saying the true measurement is between 1.9365 and 1.9375.  Since we determined our true measurement was between 1.9313 and 1.9425, the measurement with more digits overestimates the accuracy.

The usual rule is to when we add or subtract to express the result to the accuracy our least accurate measurement, here two decimal places.

We get 1.94 so an imputed range between 1.935 and 1.945.  Our actual range doesn't exactly line up with this, so we're only approximating the error, but the approximate inaccuracy is maintained.


alexdok [17]3 years ago
7 0

Actually, that person is wrong. He/she didn't explain what the statement means very clearly. She/he also used different numbers (She/he did use 45.367 and 43.43) other than the numbers mentioned in this question. If you used that answer, you would get points off so do't use it! Use mine! I turned it in for a math journal in K12 and got 100%! it is not copied! If you think it is, search it up on a plagiarism website. Here:

The statement, “When you calculate with measurements, your answer shouldn’t be any more precise than the least precise measurement.”, means that whatever number is the least precise in the problem, is basically going to turn out to be the most precise because all of the other numbers will have to be rounded to the least precise number (in this case, the hundredths place) so that it has the same place value as the least precise measurement in the problem. That means that 45.367 will have to be rounded into 45.36 because 43.43 ends in the hundredths place.

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The graph of g(x) is a transformation of the graph of f(x)=2x. Enter the equation for g(x) in the box. g(x) =
Lunna [17]
<h3>Answer:  g(x) = 2^x - 3</h3>

The -3 is not in the exponent

Explanation:

The parent function is f(x) = 2^x. Plugging in x = 0 leads to y = 1. So the point (0,1) is on the f(x) curve. Going from (0,1) to (0,-2) is a vertical shift of 3 units downward. To represent this shift, we tack on a "-3" at the end of the f(x) function.

g(x) = f(x) - 3\\\\g(x) = 2^x - 3

You could look at other points as well, but I find working with x = 0 is easiest.

As a check, plugging x = 0 into g(x) leads to...

g(x) = 2^x - 3\\\\g(0) = 2^0 - 3\\\\g(0) = 1 - 3\\\\g(0) = -2

This confirms our answer.

4 0
3 years ago
Given that X ~ N(120, 35). We survey samples of 25 and are interested in the distribution of X-bar. Find the z-score associated
lubasha [3.4K]

Answer:

Option c -2.8571

Step-by-step explanation:

z-score are calculated as

z=\frac{xbar-mean}{\frac{S.D}{\sqrt{n} } }.

We are given that mean=120 and standard deviation=S.D=35 as X~N(120,35).

Sample size=n=25.

We have to find z-score for x-bar=100. So,

z-score=[100-120]/[35/√25]

z-score=[-20]/[35/5]

z-score=-20/7

z-score=-2.8571.

Thus,  the z-score associated with x-bar = 100 is -2.8571.

8 0
3 years ago
Help with this please
Paha777 [63]
I think it is B 
hope this helps

6 0
3 years ago
An art gallery has 18 paintings and 4 photographs displayed in equal rows on the wall, with the same number of each type of art
NNADVOKAT [17]
18 divided by 4 this equals 4 with a remainder of 2 so i guess the 2 go in another row
4 0
3 years ago
Read 2 more answers
Kasey and her sister both sold cookie dough. Her sister sold three times as many tubs of cookie dough. If they sold a total of 8
Rufina [12.5K]
X= number of tubs Kasey sold
3x= number tubs sister sold

Add the number sold by Kasey and her sister to equal the total sold (88).

x + 3x= 88
combine like terms

4x= 88
divide both sides by 4

x= 22 number tubs Kasey sold


Number Sold by Sister
3x= 3(22)= 66


CHECK:
x + 3x= 88
22 + 3(22)= 88
22 + 66= 88
88= 88


ANSWER: Kasey sold 22 tubs and her sister sold 66 tubs.

Hope this helps! :)
7 0
3 years ago
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