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2 years ago

Help I will give 30 points help me out need ASAP please

Mathematics

1 answer:

Oksana_A [137]2 years ago

6 0

Answer:

21 in.

Step-by-step explanation:

The radius is half of the diameter. The diameter (as shown) is 42 inches. Divide that by two to get 21 in.

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Simplify 3x^2y^4 x 2x^6y

Feliz [49]

Answer:

6x^8y^5

Step-by-step explanation:

(3)(2)= 6

add the exponents for the variables

8 0

2 years ago

According to a recent survey, the population distribution of number of years of education for self-employed individuals in a c

creativ13 [48]

Answer:

a) X: number of years of education

b) Sample mean = 13.5, Sample standard deviation = 0.4

c) Sample mean = 13.5, Sample standard deviation = 0.2

d) Decrease the sample standard deviation

Step-by-step explanation:

We are given the following in the question:

Mean, μ = 13.5 years

Standard deviation,σ = 2.8 years

a) random variable X

X: number of years of education

Central limit theorem:

If large random samples are drawn from population with mean $\mu$ and standard deviation $\sigma$ , then the distribution of sample mean will be normally distributed with mean $\mu$ and standard deviation $\frac{\sigma}{\sqrt{n}}$

b) mean and the standard for a random sample of size 49

$\mu_{\bar{x}} = \mu = 13.5\\\\\sigma_{\bar{x}} = \dfrac{\sigma}{\sqrt{n}} = \dfrac{2.8}{\sqrt{49}} = 0.4$

c) mean and the standard for a random sample of size 196

$\mu_{\bar{x}} = \mu = 13.5\\\\\sigma_{\bar{x}} = \dfrac{\sigma}{\sqrt{n}} = \dfrac{2.8}{\sqrt{196}} = 0.2$

d) Effect of increasing n

As the sample size increases, the standard error that is the sample standard deviation decreases. Thus, quadrupling sample size will half the standard deviation.

7 0

3 years ago

The measure of ∠P is five less than four times the measure of ∠Q. If ∠P and ∠Q are supplementary angles, find m∠P

Murljashka [212]

Answer:

m∠P = 143°

Step-by-step explanation:

We know that supplementary angles add up to 180, and with the knowledge that angle P is 5 times than 4 less (5x-4) the measure of angle Q (x), we can set up the equation (4x-5)+(x)=180. We can then solve and get x = 37, and then we can plug X back into 5x-4 to get the angle of 143 degrees.

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3 years ago

The distance you travel varies directly with the amount of gas you use. You can travel 300 miles on 12 gallons of gas.

Tom [10]

(this is what I think) Every 40 miles,the car uses 1 gallon,Try doing 750/40=18.75 if not,try figuring out how much gas he uses in 18.75 gallons.

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3 years ago

What is the hydrogen ion concentration <br> of orange juice that has a pH of 1?

saw5 [17]

Answer:

0.1 mole per liter

Step-by-step explanation:

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3 years ago