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
kirill115 [55]
3 years ago
7

What's the answer for this problem

Mathematics
2 answers:
Svetllana [295]3 years ago
8 0
The answer is 23.2 because you use 29h=672.8
Sloan [31]3 years ago
6 0
The answer is 23.2.

Once again you just have to divide the total area by the base.

You might be interested in
What is the solution to the equation 6t=144
Grace [21]
Isolate the variable by dividing both sides by 6:
t=144/6=24


The solution is t=24

Good luck!
8 0
2 years ago
Read 2 more answers
Researchers at the National Cancer Institute released the results of a study that investigated the effect of weed-killing herbic
jolli1 [7]

Answer:

The 95% confidence interval for the difference in the proportion of cancer diagnoses between the two groups is (0.3834, 0.5166).

Step-by-step explanation:

Before building the confidence interval, we need to understand the central limit theorem and subtraction between normal variables.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For a proportion p in a sample of size n, the sampling distribution of the sample proportion will be approximately normal with mean \mu = p and standard deviation s = \sqrt{\frac{p(1-p)}{n}}

Subtraction between normal variables:

When two normal variables are subtracted, the mean is the difference of the means, while the standard deviation is the square root of the sum of the variances.

The randomly sampled 400 dogs from homes where an herbicide was used on a regular basis, diagnosing lymphoma in 230 of them.

This means that:

p_h = \frac{230}{400} = 0.575, s_h = \sqrt{\frac{0.575*0.425}{400}} = 0.0247

Of 200 dogs randomly sampled from homes where no herbicides were used, only 25 were found to have lymphoma.

This means that:

p_n = \frac{25}{200} = 0.125, s_n = \sqrt{\frac{0.125*0.875}{200}} = 0.0234

Distribution of the difference:

p = p_h - p_n = 0.575 - 0.125 = 0.45

s = \sqrt{s_h^2+s_n^2} = \sqrt{0.0247^2 + 0.0234^2} = 0.034

Confidence interval:

The confidence interval is:

p \pm zs

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

95% confidence level

So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

The lower bound is 0.45 - 1.96(0.034) = 0.3834

The upper bound is 0.45 + 1.96(0.034) = 0.5166

The 95% confidence interval for the difference in the proportion of cancer diagnoses between the two groups is (0.3834, 0.5166).

3 0
3 years ago
What is the value of 6<br> 364<br> 484<br> 1.365<br> 1.456
vlabodo [156]

Answer:

I think it is C

Step-by-step explanation:

If I'm wrong try B

4 0
2 years ago
What is the factorization of the expression below?
sesenic [268]

16x² - 49

= (4x)² - 7²

Identity =》 a² - b² = (a + b) (a - b)

(4x)² - 7²

= (4x + 7) (4x - 7) [3rd option]

_______

Hope it helps ⚜

4 0
2 years ago
Read 2 more answers
Solve the system by substitution <br><br> 7x-6y=16 (1)<br> y=-5<br><br> Show step by step
Nostrana [21]

Answer:

7x - 6y = 16

y = (-5)

using substitution method

7x - 6(-5) = 16

7x +30 = 16

7x = 16 - 30

7x = 14

x = 14/7

x= 2

4 0
2 years ago
Other questions:
  • 9 over 14 times 7 over 6
    6·2 answers
  • How to round 94000.00 two decimal places
    11·1 answer
  • Can someone help me in the last one's ? number 49, 50, 51, 52
    5·1 answer
  • Eric is designing a logo for his company. The logo is a rectangle with a length twice as long as the width. The logo is designed
    8·1 answer
  • The number of milligrams of a certain medicine a veterinarian gives to a dog varies directly with the weight of the dog. If the
    7·2 answers
  • Write the solution set of the inequality graphed below as a com-
    7·1 answer
  • What is the correct answer? ​
    8·2 answers
  • I need help on this question
    7·1 answer
  • PLEASE help with these 3 pretty easy problems and explain how you got them!!! I will mark brainliest if right!!!!!!!
    12·1 answer
  • Determine a set of 2 numbers that are divisible by the number shown.​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!