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
irina1246 [14]
3 years ago
8

If you could help that would be nice!

Mathematics
2 answers:
Arturiano [62]3 years ago
5 0
6 + 4 + 4 = 14 cm
2 * pi * r = 
2 * 3.14 * 3 = 18.84 / 2 = 9.42
14 + 9.42 = 23.42
Vaselesa [24]3 years ago
5 0
Perimeter of figure = 3 sides of rectangle + perimeter of semi-circle.3 sides of rectangle = 15 + 12 + 15 = 42 Perimeter of semi-circle = πr = 3.14 * 6 = 18.84In short, Your Answer would be: 42 + 18.84 = 60.84 m.
Hope this helps 
You might be interested in
An engineer has designed a valve that will regulate water pressure on an automobile engine. The valve was tested on 180180 engin
tiny-mole [99]

Answer:

z=\frac{4.6-4.8}{\frac{0.9}{\sqrt{180}}}=-2.98    

p_v =P(Z  

If we compare the p value and the significance level given \alpha=0.1 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis,and we have enough evidence to conclude that the true mean is significantly lower thn 4.8 at 10% of signficance.  

Step-by-step explanation:

Data given and notation  

\bar X=4.6 represent the sample mean

\sigma=0.9 represent the population standard deviation

n=180 sample size  

\mu_o =4.8 represent the value that we want to test

\alpha=0.1 represent the significance level for the hypothesis test.

z 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 check if thetrue mean is below the specifications, the system of hypothesis would be:  

Null hypothesis:\mu \geq 4.8  

Alternative hypothesis:\mu < 4.8  

If we analyze the size for the sample is > 30 and we know the population deviation so is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}  (1)  

z-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:  

z=\frac{4.6-4.8}{\frac{0.9}{\sqrt{180}}}=-2.98    

P-value

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

p_v =P(Z  

Conclusion  

If we compare the p value and the significance level given \alpha=0.1 we see that p_v so we can conclude that we have enough evidence to reject the null hypothesis,and we have enough evidence to conclude that the true mean is significantly lower thn 4.8 at 10% of signficance.  

4 0
3 years ago
Emma is building a wall around her garden. It has taken 45 minutes,and she is 75% done. What is the total time it will take Emma
Morgarella [4.7K]
Hey there,
It take 45 min to complete 75% of the wall
1% = 45 / 75
      = 0.6
100 % = 0.6 x 100
           = 60 min
It takes her 60 mins or 1 hour to finish building the wall.

Hope this helps :))

~Top♥
5 0
3 years ago
Read 2 more answers
Px+35=-6x+Q
julia-pushkina [17]
The answer to this question  is C 
6 0
3 years ago
Evaluate this expression <br><br> <img src="https://tex.z-dn.net/?f=8%5E%7B-2%7D" id="TexFormula1" title="8^{-2}" alt="8^{-2}" a
shepuryov [24]

Answer:

0.015625

Step-by-step explanation:

Rule: a^{-n} = \dfrac{1}{a^n}

8^{-2} = \dfrac{1}{8^2} = \dfrac{1}{64} = 0.015625

6 0
3 years ago
Read 2 more answers
If ABC congruent to GHI what us the length of Gh
otez555 [7]
The length is 13 for your answer
4 0
3 years ago
Read 2 more answers
Other questions:
  • Q #3. Ifetify the mapping diagram that represents the relation and determine whether the relation is function..{(- 3,-6),(-1,-6)
    5·1 answer
  • an elevator traveled up to the 9th floor and then down to the third floor. how many floors did the elevator travel down​
    8·1 answer
  • After 10 months the simple interest earned annually on an investment of $6000 was $769. Find the interest rate to the nearest te
    15·1 answer
  • 637,391 <br>+372,088<br>_________
    15·2 answers
  • Find the distance between the two points rounding to the nearest tenth (if necessary).
    13·1 answer
  • I need help please... im really confused​
    13·1 answer
  • I need help with this math problem
    14·1 answer
  • Urgent!!! what is this math answer?!?!
    13·2 answers
  • HELP ME PLEASE DONT MIND THAT ANSWER DIDNT MEAN THE CLICK IT :(
    12·1 answer
  • To find the angle of rotation θ between the previous x and y axes and the new x′ and y′ axes, we use the formula: cotangent of 2
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!