Help Help Help Help Help Help

Victoria recently switched to a new electric company. If she uses between 0 and 400 kilowatt-hours (kWh) of electricity per mont

Gekata [30.6K]

Answer:

see the explanation

Step-by-step explanation:

The question is

Identify the domain and the range, using words and inequalities

Let

x -----> the number of kilowatt-hours (kWh) of electricity per month

y ----> the price per month

we know that

Part 1) For the value of x between 0 kWh and 400 kWh

$0\ kWh \leq x < 400\ kWh$

The price is equal to

$y=\$30$

therefore

The domain is the interval ------> [0,400)

The domain is all real numbers greater than or equal to 0 kWh and less than 400 kWh

The range is ($30)

The range is equal to $30

Part 2) For the value of x equal to 400 kWh or more per month

$x\geq 400\ kWh$

The domain is the interval -----> [400, infinite)

The domain is all real numbers greater than or equal to 400 kWh

The price is

$y=0.097x$

Find the range

For x=400 kWh

$y=0.097(400)=\$38.8$

so

$y\geq \$38.8$

The range is the interval -----> [38.8, infinite)

7 0

3 years ago

What is the solution to this inequality?

Alika [10]

Answer:

Step-by-step explanation:

e5uiitweyutwwsuoye34t

3 0

3 years ago

Read 2 more answers

The income distribution in a county is a normal distribution with a mean income of $10,000. The top 2.5% of the wage earners ear

earnstyle [38]

Answer:

84% of the wage earners earn less than $14,000 each.

Step-by-step explanation:

The Empirical Rule (68-95-99.7%)-

According to this around 95% of the data will fall within two standard deviations of the mean.

As the bell curve is symmetrical, so the remaining 5% will be divided into 2 equal parts. So 2.5% will be above 2 standard deviation and 2.5% will be below 2 standard deviation.

As it is given that, the top 2.5% of the wage earners earn $18,000 or more, so 18,000 is 2 standard deviation away from the mean 10,000.

i.e $2\sigma=18000-10000=8000$

$\Rightarrow \sigma = 4000$

We know that,

$Z=\dfrac{X-\mu}{\sigma}$

where,

X = raw score = 14,000

μ = 10,000

σ = 4,000

Putting the values,

$Z=\dfrac{14000-10000}{4000}=\dfrac{4000}{4000}=1$

Now, calculating the value from the z score table,

$P(1)=0.8413=84.13\%$

As the probability at $z=1$ is the area below that, so 84% of the wage earners earn less than $14,000 each.

6 0

3 years ago

Can someone help me??

Elan Coil [88]

Answer:

Bhai which class do you read and which country please comment

4 0

2 years ago

Find the area of the shape shown below.

Tatiana [17]

Answer:

I believe the answer is a=58

Step-by-step explanation:

a=1+25+8+24

a=26+8+24

a=34+24

a=58

6 0

2 years ago