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
Natali [406]
3 years ago
5

3 tens minus 3 tens 3 tenth

Mathematics
1 answer:
Sati [7]3 years ago
7 0
3 tens= 30
3 tens 3 tenth= 30.3

30-30.3= -0.3
You might be interested in
The orbit of the space shuttle is approximately a circle with a radius of 4100?
Ipatiy [6.2K]
The correct question is
The orbit of the space shuttle is approximately a circle with a radius of 4100 mi. How far do the astronauts travel with each orbit? 

we know that
[the circumference of a circle]=2*pi*r
for r=4100 mi
[the circumference of a circle]=2*pi*4100-----> 25761.06 mi

the answer is
25761.06 mi
7 0
3 years ago
James is running on a trail that is 5/4 of a mile long. So far he has run 2/3 of the trail. How many miles has he run so far?
aalyn [17]
Step 1) You would need to convert your 2 fractions into equivalent numbers. In this case, the closet gcf (greatest common factor) is 12. So, 5/4 would convert to 15/12 and  2/3 converts to 8/12.

Step 2) You know have your decimals that are equivalent. All you have left now is to subtract. Take 15/12 and subtract 8/12 from it. You would now get 7/12 of a mile that is still needed to run. 

Step 3) Usually, you would simplify your new fraction. In this case, our fraction doesn't simplify. It will stay 7/12 of a mile. For example, If our number had ended up being 4/12, then we would simplify it to 1/3 of a mile. Because, 4 divided by 4 is 1 and 12 divided by 4 is 3. You can't simplify your answer anymore.

Hope this helped!
3 0
3 years ago
Read 2 more answers
At what point do the graphs of 9x - 2y = 30 and x + 2y = 10 intersect
strojnjashka [21]

Answer:

(4,3)

Step-by-step explanation:

4 0
3 years ago
The national mean annual salary for a school administrator is $90,00 a year (The Cincinnati Enquirer, April 7, 2012). A school o
timurjin [86]

Answer:

a) Null hypothesis:\mu = 90000  

Alternative hypothesis:\mu \neq 90000  

b) p_v =2*P(t_{(24)}  

c) If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean for the salary differs from 9000 at 5% of significance.

Step-by-step explanation:

1) Data given and notation  

77600 ,76000 ,90700 ,97200 ,90700 ,101800 ,78700 ,81300 ,84200 ,97600 ,

77500 ,75700 ,89400 ,84300 ,78700 ,84600 ,87700 ,103400 ,83800 ,101300

94700 ,69200 ,95400 ,61500 ,68800

We can calculate the sample mean and deviation with the following formulas:

\bar X =\frac{\sum_{i=1}^n X_i}{n}

s=\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}

The values obtained are:

\bar X=85272 represent the mean annual salary for the sample  

s=11039.23 represent the sample standard deviation for the sample  

n=25 sample size  

\mu_o =90000 represent the value that we want to test

\alpha=0.05 represent the significance level for the hypothesis test.  

t would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

Part a: State the null and alternative hypotheses.  

We need to conduct a hypothesis in order to check if the mean salary differs from 90000, the system of hypothesis would be:  

Null hypothesis:\mu = 90000  

Alternative hypothesis:\mu \neq 90000  

If we analyze the size for the sample is < 30 and we don't know the population deviation so is better apply a t test to compare the actual mean to the reference value, and the statistic is given by:  

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

t-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".  

Part b: Calculate the statistic

We can replace in formula (1) the info given like this:  

t=\frac{85272-90000}{\frac{11039.23}{\sqrt{25}}}=-2.141    

P-value

The first step is calculate the degrees of freedom, on this case:  

df=n-1=25-1=24  

Since is a two sided test the p value would be:  

p_v =2*P(t_{(24)}  

Part c: Conclusion  

If we compare the p value and the significance level given \alpha=0.05 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis, so we can conclude that the true mean for the salary differs from 9000 at 5% of significance.

6 0
3 years ago
Will mark brainliest!! Please help asap!!
Anna007 [38]

Answer:

the answer is A

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • Simplify 4 times square root 24 minus 4 square root 8 plus square root of 98.
    10·1 answer
  • A. greater than 1.<br><br>b. less than 1.<br><br>c. equal to 1
    15·1 answer
  • 32,111÷181= <br>whats is the remainder
    14·1 answer
  • What is the values of the 4s in 4,400
    15·1 answer
  • A field test for a new exam was given to randomly selected seniors. The exams were graded, and the sample mean and sample standa
    8·1 answer
  • What is the volume of the prism?<br> in.3.<br>I need help​
    14·2 answers
  • Help pls show brainly
    7·2 answers
  • 1. Un representante de ventas debe visitar 6 ciudades durante un viaje. a) Si hay 10 ciudades en el área geográfica que va a vis
    7·1 answer
  • Find the distance between A(4, —2) and B(—1, 2).<br> Round to the nearest tenth.
    15·2 answers
  • What is the mean for Doctor A’s data set on contacts? What is the mean for Doctor B’s data set on contacts? Write a sentence com
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!