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3 years ago

0.04 is 1/10 0f what

Mathematics

2 answers:

PSYCHO15rus [73]3 years ago

8 0

0.04, or 4 hundredths is 10 percent of 0.40
10 times 0.04 gives you 0.40

cupoosta [38]3 years ago

5 0

0.04, or 4 hundredths is 10 percent of 0.40
10 times 0.04 gives you 0.40

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Find last year’s salary if, after a 3% pay raise, this year’s salary is $30,900

Liono4ka [1.6K]

Your answer is $30,000.
The way I have answered this is quite strange, but I'll do my best to explain it. So because we know that $30,900 is 3% than last year, we can call it 103%. This allows us to form a ratio and therefore find 100%.
30,900 : 103
÷ 103
300 : 1
× 100
30,000 : 100
Which means $30,000 is 100%, or 3% less than $30,900. I hope this helps! Let me know if it was confusing or anything :)

5 0

3 years ago

Read 2 more answers

Intellectual development (Perry) scores were determined for 21 students in a first-year, project-based design course. (Recall th

Anit [1.1K]

Answer:

The 99% confidence interval is (3.0493, 3.4907).

We are 99% sure that the true mean of the students Perry score is in the above interval.

Step-by-step explanation:

Our sample size is 21.

The first step to solve this problem is finding our degrees of freedom, that is, the sample size subtracted by 1. So

$df = 21-1 = 20$ .

Then, we need to subtract one by the confidence level $\alpha$ and divide by 2. So:

$\frac{1-0.99}{2} = \frac{0.01}{2} = 0.005$

Now, we need our answers from both steps above to find a value T in the t-distribution table. So, with 20 and 0.005 in the two-sided t-distribution table, we have $T = 2.528$

Now, we find the standard deviation of the sample. This is the division of the standard deviation by the square root of the sample size. So

$s = \frac{0.40}{\sqrt{21}} = 0.0873$

Now, we multiply T and s

$M = 2.528*0.0873 = 0.2207$

Then

The lower end of the interval is the mean subtracted by M. So:

$L = 3.27 - 0.2207 = 3.0493$

The upper end of the interval is the mean added to M. So:

$LCL = 3.27 + 0.2207 = 3.4907$

The 99% confidence interval is (3.0493, 3.4907).

Interpretation:

We are 99% sure that the true mean of the students Perry score is in the above interval.

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3 years ago

There are 3072 books in the school library if 96 students reads the same number of books how many books would each student need

s2008m [1.1K]

Answer:

32 books each

Step-by-step explanation:

5 0

3 years ago

Raju and Johari baked 143 muffins altogether. Andrew and Johari baked 211 muffins altogether. (b) If Andrew baked 113 muffins, h

n200080 [17]

Answer:

467 muffins

Step-by-step explanation:

143 + 211 + 113 = 467

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3 years ago

What number do you divide by 12 to get 9

finlep [7]

Well I don't know. Let's figure it out together.

You said (a number) divided by 12 gives you 9 .

A fraction is the easiest way to show division, so
you can write this equation:

   (number) / 12 = 9

Now you can multiply each side of the equation by 12 .
When you do that, you have ...

   number = 9 x 12

   <em>number =    108</em> .

Now you know how to find it. That's even better than just
having the answer.

5 0

3 years ago

Read 2 more answers