8-73apanswers

=1. Mean, Median, Mode=

=Mean=
 * Definition:** The average amount of the data set. Add all the numbrs in the data set to get the sum of all data. You then divide the sum of all data by the total amount of digits in the data set. Remember to put in numerical order.

1, 5, 4, 4, 9, 7, 10
 * Question:** What is the mean in the data set?


 * Answer:** 1+4+4+5+7+9+10=40
 * 40** is the mean because it is the average amount of data set.

=Median=
 * Definition:** The median is the middle number. The data set must be in numerical order to find the median.

1, 3, 7, 8, 5, 9, 2
 * Question:** What is the median in the data set?


 * Answer:**

=Mode=
 * Definition:** The number in a data set that you see the most.

Data set one: 2, 4, 6, 8, 8, 10 Data set two: 1, 3, 4, 5, 6, 6 Data set three: 3, 3, 5, 7, 8, 11
 * Question:** What is the mode in the data sets?

Data set one: 2, 4, 6, **8**, **8**, 10
 * Answer:**
 * 8** is the answer because it is the most common number in the data set.

Data set two: 1, 3, 4, 5, **6**, **6**
 * 6** is the answer because it is the most common number in the data set.

Data set three: **3**, **3**, 5, 7, 8, 11
 * 3** is the answer because it is the most common number in the data set.

= = =2. Perfect Squares=
 * Definition:** The product of a number that is multiplied by itself.


 * Question:** Which of the following squares is a perfect square?




 * Answer:** The answer is square **B** because each side of the square are equal.

=Square Roots=
 * Definition:** A number that when multiplied by itself equals a given number.


 * Question:** What is the square root of 30?

5x5 = 25 (30 is in between these two numbers) 6x6 = 36
 * Answer:** Find the perfect squares before and after the number you are trying to solve.

36 - 25 = 11 (denominator) 30 - 16 = 14 (numerator)

Find the square roots of the previous number (25) 25 = 5x5 (square roots) 5 is now the whole number in your fraction.

So, the square root for 30 is **5 14/11**

=3. Percents=
 * Definition:** A percent is an equivalent fraction out of 100.


 * Question:**


 * Answer:**

=4. Ratios and Proportions=

=Ratios=
 * Definition:** A comparison of two numbers.




 * Question:** You have a notebook of 50 sheets of paper; and 15 of them are black. A page falls from your notebook; what is the probability is was a black?

You have 50 sheets of paper. 15 of those sheets are black. 50 + 15 = 65 15 is the numerator because that's the number of black sheets there are in the notebook. 65 is your denominator because that's the total number of sheets in the notebook. 0.3 x 100 = 30%
 * Answer:** 15 divided by 50 = 0.3



=Propotions=
 * Definition:** A relationship between one part to another or to the whole where they are equal..


 * Question:** If a child could run 10 blocks in 5 minutes. How long does it take the child to run 15 blocks, at the same speed ?

5 x 1.5 = **7.5**
 * Answer:** 15 divided by 10 = 1.5



It takes the child **7 minutes** and **5 seconds** to run 15 blocks.