Ask question

Ask question

All categories

3 years ago

6

The price of a gallon of unleaded gas has dropped to 2.82 today. yesterday's price was 2.89. find the percentage decrease. round

to the nearest tenth

1 answer:

Artist 52 [7]3 years ago

3 0

Answer :

percentage decrease = {(2.89-2.82)/2.89}x100 = 2.42%

You might be interested in

How to create an equation in point slope form

poizon [28]

Answer:

the formula is y=mx+b

Step-by-step explanation:

Sorry I wasn't sure exactly what you were asking. I hope that helps

5 0

3 years ago

Read 2 more answers

SCCoast, an Internet provider in the Southeast, developed the following frequency distribution on the age of Internet users. Fin

Tomtit [17]

Answer:

Mean: 40.17 years.

Standard deviation: 10.97 years.

Step-by-step explanation:

The frequency distribution is in the attached image.

We can calculate the mean adding the multiplication of midpoints of each class and frequency, and dividing by the sample size.

The midpoints of a class is calculated as the average of the bounds of the class.

Then, the mean can be written as:

$E(X)=\dfrac{1}{N}\sum f_iX_i\\\\\\E(X)=\dfrac{1}{60}(3\cdot15+7\cdot25+18\cdot35+20\cdot45+12\cdot 55)=\dfrac{45+175+630+900+660}{60}\\\\\\E(X)=\dfrac{2,410}{60}=40.17$

The standard deviation can be calculated as:

$s=\sqrt{\dfrac{1}{N-1}\sum f_i(X_i-E(X))^2}\\\\\\s=\sqrt{\dfrac{1}{59}[3(15-40.17)^2+7(25-40.17)^2+18(35-40.17)^2+20(45-40.17)^2+12(55-40.17)^2]}$

$\\\\\\s=\sqrt{\dfrac{1}{59}( 1,900.59 + 1,610.90 + 481.12 + 466.58 + 2,639.15 )}\\\\\\s=\sqrt{\dfrac{ 7,098.33 }{59}}=\sqrt{120}=10.97$

4 0

3 years ago

Evaluate the expression 6x+8<br> when x=2<br> .

snow_lady [41]

Answer:

20

Step-by-step explanation:

plug in the numbers

6 times 2 + 8 = 20

5 0

3 years ago

Whats the midline equation ?

PSYCHO15rus [73]

Answer:

sorry i did not see my link

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

Oliga [24]

Where are the choices

6 0

3 years ago