After the store gives 20% off sale, the expression of the item at price p can be written as, p-0.2=0.8p.
Given to us
A store is having a 20% off sale.
The sale price of an item with price p is p – 0. 2p.
<h3>What is the total price of the item?</h3>We know that for any item the price can be 100%(1.00) of itself, therefore, the price of the item will be p.
<h3>What is the expression is equivalent to?</h3>We know that for any item the price can be 100%(1), therefore, after giving 20%(0.2) off sale, the price will be 80%(1-0.2 = 0.8) of the original.
Thus, the expression is equivalent to
Hence, after the store gives 20% off sale, the expression of the item at price p can be written as, p-0.2=0.8p.
Learn more about Expression:
Answer:
<em>L = 24,873.6 miles</em>
Step-by-step explanation:
<u>Length of the Circumference</u>
Given a circle of radius r, the length of the circumference, or line surrounding the shape is:
The Earth has a diameter of 7,917.5 miles. The radius is half the diameter:
r=7,917.5/2=3,958.75 miles
Assuming a plane flies around the equator at ground level, the distance it would travel is:
L = 24,873.6 miles
Answer:
Sally's temperature is 97.27 °F.
Step-by-step explanation:
All the information given in the question tells us that the human body temperatures are normally distributed with a population's mean = 98.20°F and a standard deviation = 0.62°F.
The question gives us Sally's temperature in a <em>z-score</em>. We have to remember that the <em>standard normal distribution</em> is a particular case of a <em>normal distribution</em> where the mean = 0 and the standard deviation = 1.
Using <em>the standard normal distribution,</em> we can determine every probability associated with a normal distribution "transforming" the raw scores, coming from normally distributed data, into z-scores.
A z-score gives us the distance from the population's mean and is in standard deviation units. So, a z = 1.5 tells us that the value is 1.5 standard deviations <em>above the mean</em>. Conversely, a z = -1.5 tells us that the raw score is also 1.5 standard deviation from the mean, but in the opposite direction, that is, <em>below the mean</em>.
The formula for a z-score is as follows:
(1)
Where
.
.
.
Then to find <em>x </em>(or the raw score, that is, Sally's temperature), we need to solve the formula (1) for it to finally solve the question.
Then
°F
°F
Thus (with no units)
°F
Thus, Sally's temperature is °F (rounding the answer to the nearest hundredth).