Answer:
1.
2 and 3: See explanation
Step-by-step explanation:
Solving (1)
--- radius
The area is:
There are no enough information to solve (2) and (3) as the radius and/or diameter are not provided.
However, the following formula will be used to calculate the required areas.
--- same process as (1)
Answer:
b=45/4
Step-by-step explanation:
This is a special triangle 30-60-90.
In big triangle hypotenuse 15, short leg x=(hypotenuse/2), x=15/2.
In smallest triangle :
1. This is also special triangle 30-60-90
2. x=15/2 hypotenuse
3. "a" is a shortest leg in the smallest triangle,
so a=(15/2)/2=15/4
a+b=15
15/4 +b=15
b=15 -15/4=15*4/4 -15/4 = 45/4
b=45/4
Answer:
The statement true about the results of the survey is:
- <u>D. 48% of students preferred the seacoast</u>.
Step-by-step explanation:
To identify if the D option is right, you only must use a simple rule of three, where you use the total of the members surveyed in the club (150), and the number of members that preferred the seacoast (72), by the last the operation must confirm that this value (72) is equal to the 48% (how says in the D option). First, you must establish the rule of three:
- 150 = 100 (100% of surveyed really, but is easier to understand in this form)
- 72 = X
And operate:
- X= (72 * 100) / 150
- <u>X = 48 (this means the 48%)
</u>
How you can see, <em><u>the value obtained in the simple rule of three is exactly the percentage of the D option, for this reason, this is the true statement</u></em>.
Answer:
0.1875 and 0.12
Step-by-step explanation:
3/4x1/4 is 0.1875. 3/5 x 1/5 is 0.12
Answer: 3
Step-by-step explanation: PEMDAS
First you multiple 1 and 4 then add 1 and subtract it by 2/