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2 years ago

What are three things you know about exponential functions?

Mathematics

1 answer:

Verdich [7]2 years ago

5 0

Answer:

1. There non-linear.

2. They can either be exponential decay or growth

3. They are functions :P

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A random sample of 10 parking meters in a beach community showed the following incomes for a day. Assume the incomes are normall

Vlad1618 [11]

Answer: (2.54,6.86)

Step-by-step explanation:

Given : A random sample of 10 parking meters in a beach community showed the following incomes for a day.

We assume the incomes are normally distributed.

Mean income : $\mu=\dfrac{\sum^{10}_{i=1}x_i}{n}=\dfrac{47}{10}=4.7$

Standard deviation : $\sigma=\sqrt{\dfrac{\sum^{10}_{i=1}{(x_i-\mu)^2}}{n}}$

$=\sqrt{\dfrac{(1.1)^2+(0.2)^2+(1.9)^2+(1.6)^2+(2.1)^2+(0.5)^2+(2.05)^2+(0.45)^2+(3.3)^2+(1.7)^2}{10}}$

$=\dfrac{30.265}{10}=3.0265$

The confidence interval for the population mean (for sample size <30) is given by :-

$\mu\ \pm t_{n-1, \alpha/2}\times\dfrac{\sigma}{\sqrt{n}}$

Given significance level : $\alpha=1-0.95=0.05$

Critical value : $t_{n-1,\alpha/2}=t_{9,0.025}=2.262$

We assume that the population is normally distributed.

Now, the 95% confidence interval for the true mean will be :-

$4.7\ \pm\ 2.262\times\dfrac{3.0265}{\sqrt{10}} \\\\\approx4.7\pm2.16=(4.7-2.16\ ,\ 4.7+2.16)=(2.54,\ 6.86)$

Hence, 95% confidence interval for the true mean= (2.54,6.86)

7 0

4 years ago

The range for a list of numbers is 7. the smallest value is 4. what is the largest value in the list

Katena32 [7]

Answer:

Step-by-step explanation:

8 0

3 years ago

Help please! Picture included about functions. Explain if you can.

slega [8]

The definition of a function is a relation where every input (x value) is paired with exactly one output (y-value).

A. Not a function, because you have (300, 9) and (300,7). The x-value 300 is paired with two different y-values, 9 and 7.

B. Not a function. (260, 4) and (260, 2)

C. Is a function

D. Not a function. (225, 4) and (225, 2)

3 0

3 years ago

Pete is 15 years old.This is 6 years younger than his sister Vitoria.Write and solve a subtraction equation to find Victoria’s a

oee [108]

Answer:

well 15 + 6 is 21 vitoria is 21

Step-by-step explanation:

Therfore 21- 6 = 15

7 0

3 years ago

Read 2 more answers

A survey devices eyepiece is 6 feet off the ground. The device is placed 60 feet from a tree, the eyepiece must be elevated upwa

Aleks [24]

<em>Greetings from Brasil...</em>

Pure application of trigonometry - tangent

<em>see the attachment</em>

H = X + 6

and

TG 33 = X/60

X = 60.TG 33

X ≈ 39

H = X + 6

H = 39 + 6

8 0

3 years ago