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4 years ago

Geometry Can someone please explain how to complete the question attached? Thanks.

Mathematics

1 answer:

Anarel [89]4 years ago

4 0

The answer is 62, also can u try to help me with my question on my account

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Carla and rob left a 20% tip after having lunch at a restaurant the amount of the tip was $6 Carla's lunch cost $15 which equati

siniylev [52]

This question is a little tricky. Carla had a bill of $15, which we will add to the cost of Rob's lunch. They left a 20% tip on the TOTAL cost of both their lunches, which should equal $6. 20% is equivalent to 0.2. So, the equation is 6=0.2(x+15). In other words, 20% of the sum of Carla and Rob's lunches is 6 dollars.

Answer: 6=0.2(x+15)

6 0

4 years ago

According to 2015 census data, 42.7 percent of Colorado residents were born in Colorado. If a sample of 250 Colorado residents i

stepladder [879]

Answer:

$sd(X)=\sqrt{np(1-p)}=\sqrt{250*0.427*(1-0.427)}=7.82$

The best option is:

B.7.82

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Data given

$p_C$ represent the real population proportion for residents born in Colorado

$\hat p_C =0.427$ represent the estimated proportion for rsidents born in Colorado

$n_C=250$ is the sample size selected

Solution to the problem

Let X the random variable of interest (number of residents in the sample), on this case we now that:

$X \sim Binom(n=250, p=0.427)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

The expected value is given by this formula:

$E(X) = np=250*0.427=106.75$

And the standard deviation for the random variable is given by:

$sd(X)=\sqrt{np(1-p)}=\sqrt{250*0.427*(1-0.427)}=7.82$

The best option is:

B.7.82

8 0

3 years ago

5. There are four times as many

lapo4ka [179]

There are 32 questions

5 0

4 years ago

First answer get the best marks

Sonja [21]

Answer:

Choice C

Step-by-step explanation:

$-3.55g \le -28.4$

Divide both sides by -3.55; remember that by dividing both sides of an inequality by a negative sign, you need to change the direction of the inequality sign.

$\dfrac{-3.55g}{-3.55} \ge \dfrac{-28.4}{-3.55}$

$g \ge 8$

Answer: Choice C

6 0

4 years ago

Read 2 more answers

Help please and show the steps

Phantasy [73]

9514 1404 393

Answer:

4096∠0°

Step-by-step explanation:

The polar form of the base value is 2∠120°. Then the 12-th power is ...

(2^12)∠(12×120°) = 4096∠0° . . . . or θ = 0 radians, as you wish

_____

I prefer the simpler notation r∠θ, rather than ...

r(cos(θ) +i·sin(θ)) or r·cis(θ) or r·e^(iθ)

You might not see this notation very often in areas outside of electrical engineering.

7 0

3 years ago

*Geometry* Can someone please explain how to complete the question attached? Thanks.​

Geometry Can someone please explain how to complete the question attached? Thanks.