Lines a, b, c, d, and e are distinct lines in

How to determine if a continuous graph is a function

k0ka [10]

Answer: A function is continuous when its graph is a single unbroken curve ... ... that you could draw without lifting your pen from the paper.

Step-by-step explanation:

3 0

2 years ago

The Pew Forum on Religion and Public Life reported on Dec. 9, 2009, that in a survey of 2003 American adults, 25% said they beli

Nataly [62]

Answer:

The confidence interval at the 99% confidence level for the proportion of all adult Americans who believe in astrology is (0.2251, 0.2749). This means that we are 99% sure that the true proportion of all adult Americans who believe in astrology is in this interval.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

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

For this problem, we have that:

$p = 0.25, n = 2003$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.25 - 2.575\sqrt{\frac{0.25*0.75}{2003}} = 0.2251$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.25 + 2.575\sqrt{\frac{0.25*0.75}{2003}} = 0.2749$

The confidence interval at the 99% confidence level for the proportion of all adult Americans who believe in astrology is (0.2251, 0.2749). This means that we are 99% sure that the true proportion of all adult Americans who believe in astrology is in this interval.

6 0

2 years ago

Answer all questions on there plz 100 points come on

saw5 [17]

this is the answer to question one

3:1:2 = 90:30:60

and the answer to the second one

3 0

2 years ago

Read 2 more answers

BRAINLIESTTT ASAP! PLEASE HELP ME :)

labwork [276]

Answer:

$\large \boxed{\text{5.2 lb$\cdot$in}^{-2}}}$

Step-by-step explanation:

In a direct proportion,

Pressure = constant × temperature

p = kT

We can use the initial conditions to find the value of k, and then calculate the pressure at the new temperature.

1. Determine the value of k

Data:

p₁ = 6 lb·in⁻²

T₁ = 440 K

Calculation:

$\begin{array}{rcl}p_{1} & = &k \times T_{1}\\6 & = &k \times 440\\k & = & \dfrac{6}{440}\end{array}$

2.Calculate the new pressure

$\begin{array}{rcl}p_{2} & = &k \times T_{2}\\& = &\dfrac{6}{440} \times 380\\\\& = & \mathbf{5.2}\end{array}\\\text{The new pressure is $\large \boxed{\textbf{5.2 lb$\cdot$in}^{\mathbf{-2}}}$}$

5 0

2 years ago

you ask a friend to think of a number from seven to forourteen. what is the probability that this number will be an even number?

DaniilM [7]

Answer:

1 in 2

Step-by-step explanation:

The possible whole numbers between 7 and 14 are 7, 8, 9, 10, 11, 12, 13, and 14.

There are 4 even numbers and 4 odd numbers in this set. Therefore half of the time an even number will be picked and half of the time an odd number will be picked. This is a "50/50" scenario. HTH.

4 0

2 years ago