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
wolverine [178]
3 years ago
10

The width of a certain rectangle is 75% of its length. The perimeter of the rectangle is 148 centimeters. What are the dimension

s of the rectangle?

Mathematics
1 answer:
Makovka662 [10]3 years ago
6 0
I only suppose this is the right answer

You might be interested in
It is claimed that automobiles are driven on average more than 20,000 kilometers per year. To test this claim, 100 randomly sele
kow [346]

Answer:

t=\frac{23500-20000}{\frac{3900}{\sqrt{100}}}=8.974      

p_v =P(t_{99}>8.974)=9.43x10^{-15}  

If we compare the p value and the significance level given for example \alpha=0.05 we see that p_v so we can conclude that we to reject the null hypothesis, and the actual mean is significantly higher than 20000.      

Step-by-step explanation:

1) Data given and notation      

\bar X=23500 represent the sample mean  

s=3900 represent the sample standard deviation      

n=100 sample size      

\mu_o =2000 represent the value that we want to test    

\alpha 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)  

State the null and alternative hypotheses.      

We need to conduct a hypothesis in order to determine if the true mean is higher than 20000, the system of hypothesis would be:      

Null hypothesis:\mu \leq 2000      

Alternative hypothesis:\mu > 2000      

We don't know the population deviation, so for this case 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".  

Calculate the statistic      

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

t=\frac{23500-20000}{\frac{3900}{\sqrt{100}}}=8.974      

Calculate the P-value      

First we need to calculate the degrees of freedom given by:  

df=n-1=100-1=99  

Since is a one-side upper test the p value would be:      

p_v =P(t_{99}>8.974)=9.43x10^{-15}  

Conclusion      

If we compare the p value and the significance level given for example \alpha=0.05 we see that p_v so we can conclude that we to reject the null hypothesis, and the actual mean is significantly higher than 20000.      

8 0
3 years ago
Please Help!! Will Mark Brainliest!!!
Gennadij [26K]

Answer:

a. This data best fits an exponential model.

b. The regression equation would be:  y = 8385(1.12)^x

c. The y-intercept would be the starting value of the account.

d. Yes, the correlation coefficient is 0.9983.

e. If you input 6 into the equation, you will get a value of $16,550.

Step-by-step explanation:

I hope this helps, and I would appreciate the brainiest asap.

8 0
2 years ago
PLEASE ANSWER ASAP IF ANSWERED WITHIN 30 MINUTES YOU WILL RECEIVE BRAINLIEST
Hunter-Best [27]
A. 9.3 x 10^7 miles
B. 4 x 10^-2 inches
C. 5.89248 x 10^12 inches
D. 1.47312 x 10^14 fireflies
3 0
3 years ago
Read 2 more answers
Pls help with all of this idk how to do
garik1379 [7]
4 times 1 = 4 so the top one would be 4/12, but i can't help with the rest because i don't understand what they are asking for 
5 0
3 years ago
Evaluate x (5-y) ; use x=6,and y=1​
Zolol [24]

Answer:

24

Step-by-step explanation:

x (5-y)

Let x=6,and y=1​

6(5-1)

PEMDAS says parentheses first

6(4)

24

6 0
3 years ago
Other questions:
  • Is a ratio a rate always, sometimes, or never?
    14·1 answer
  • If you divide 4÷3 what would you get!
    7·1 answer
  • What is the 5th term in geometric number pattern where the first term is 4 and the ratio 3/1
    15·1 answer
  • (HELP ASAP PLEASE!!)
    11·1 answer
  • Find the slope between:<br> (4,6)<br> (-1, -3)
    5·2 answers
  • If Jasmine's gross earnings are $400 per week, then what is her net weekly pay after
    14·1 answer
  • A square with a side length of 3 units is dilated with a scale factor of 2
    11·2 answers
  • (-412)+3=
    7·2 answers
  • Giveing 15 points.Use the rectangle to find the measure of the following angles measure ane BAC=25
    7·1 answer
  • Determine the slope and y-intercept of the line represented by the linear equation:y + 2 = 0. Graph the line using the slope and
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!