1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Stella [2.4K]
3 years ago
9

4 / 500 in scientific notation would be?

Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
3 0
4/500=0.008

scientific notation form = 8 x 10^9
You might be interested in
Mia needs to bring at least 25 pieces of fruit to the school picnic. She suggested both apples and oranges and was told to be su
Elena L [17]
The number of apples is x, and the number of oranges is y.


"Mia needs to bring at least 25 pieces of fruit to the school picnic."

means that x+y≥25


"
She was told to be sure to bring more than 10 apples."

means that x≥10


thus, the inequalities are:

i) 
x+y≥25

ii) 
x≥10


6 0
3 years ago
Read 2 more answers
Please Guys<br><br><br> -4n(5n+6)-5(3+3n)
Ratling [72]

Answer:

I tried this but i got it wrong it is not b on the test thing

Step-by-step explanation:

oop

5 0
3 years ago
The temperature of a certain solution is estimated by taking a large number of independent measurements and averaging them. The
Mademuasel [1]

Answer:

(a) The 95% confidence interval for the temperature is (36.80°C, 37.20°C).

(b) The confidence level is 68%.

(c) The necessary assumption is that the population is normally distributed.

(d) The 95% confidence interval for the temperature if 10 measurements were made is (36.93°C, 37.07°C).

Step-by-step explanation:

Let <em>X</em> = temperature of a certain solution.

The estimated mean temperature is, \bar x=37^{o}C.

The estimated standard deviation is, s=0.1^{o}C.

(a)

The general form of a (1 - <em>α</em>)% confidence interval is:

CI=SS\pm CV\times SD

Here,

SS = sample statistic

CV = critical value

SD = standard deviation

It is provided that a large number of independent measurements are taken to estimate the mean and standard deviation.

Since the sample size is large use a <em>z</em>-confidence interval.

The critical value of <em>z</em> for 95% confidence interval is:

z_{0.025}=1.96

Compute the confidence interval as follows:

CI=SS\pm CV\times SD\\=37\pm 1.96\times 0.1\\=37\pm0.196\\=(36.804, 37.196)\\\approx (36.80^{o}C, 37.20^{o}C)

Thus, the 95% confidence interval for the temperature is (36.80°C, 37.20°C).

(b)

The confidence interval is, 37 ± 0.1°C.

Comparing the confidence interval with the general form:

37\pm 0.1=SS\pm CV\times SD

The critical value is,

CV = 1

Compute the value of P (-1 < Z < 1) as follows:

P(-1

The percentage of <em>z</em>-distribution between -1 and 1 is, 68%.

Thus, the confidence level is 68%.

(c)

The confidence interval for population mean can be constructed using either the <em>z</em>-interval or <em>t</em>-interval.

If the sample selected is small and the standard deviation is estimated from the sample, then a <em>t</em>-interval will be used to construct the confidence interval.

But this will be possible only if we assume that the population from which the sample is selected is Normally distributed.

Thus, the necessary assumption is that the population is normally distributed.

(d)

For <em>n</em> = 10 compute a 95% confidence interval for the temperature as follows:

The (1 - <em>α</em>)% <em>t</em>-confidence interval is:

CI=\bar x\pm t_{\alpha/2, (n-1)}\times \frac{s}{\sqrt{n}}

The critical value of <em>t</em> is:

t_{\alpha/2, (n-1)}=t_{0.025, 9}=2.262

*Use a <em>t</em>-table for the critical value.

The 95% confidence interval is:

CI=37\pm 2.262\times \frac{0.1}{\sqrt{10}}\\=37\pm 0.072\\=(36.928, 37.072)\\\approx (36.93^{o}C, 37.07^{o}C)

Thus, the 95% confidence interval for the temperature if 10 measurements were made is (36.93°C, 37.07°C).

3 0
3 years ago
Which trig functions are positive for angles terminating in quadrant IV
beks73 [17]
Cosine functions are positive in quadrant 4

Here is a helpful mnemonic All Students Take Calculus (might be helpful in the future)

4 0
3 years ago
Dilations He said she said
marissa [1.9K]

Answer:

the answer should be Annie

8 0
2 years ago
Other questions:
  • If ax+x^2=y^2-ay what is a in terms of x and y?
    15·1 answer
  • A box contains 17 balls numbered 1 through 17. Two balls are drawn in succession without replacement. If the second ball has the
    13·1 answer
  • Please help me... Everyone is getting this wrong...
    14·2 answers
  • Simplify 4(2+3/4n(3n))=8
    12·1 answer
  • Jason has saved 8 quarters from washing cars how many cents does jason have
    7·2 answers
  • Bill mixes candy costing 45cents per pound with candy costing 65cents a pound. A 7-pound box of the mix costs $3.65. How much of
    11·1 answer
  • Pls help me with this question.
    15·1 answer
  • Building A is 464 feet tall and Building B is 321 feet tall. Dale is standing between the buildings. The angle of elevation from
    9·1 answer
  • What is the average rate of change of g over the interval [-2,4]
    11·1 answer
  • What is a equivalent expression for 10(y² + 2.45)
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!