Answer:
C = 6.28
A = 3.14
Step-by-step explanation:
use the equations for area and circumference to solve
C = pi d
A = pi r^2
I like to remember these using the saying Cherry pie's delicious, Apple pie's are too so Cherry = pi's delicious, Apple = pi's r 2
so with the diameter of 2 plug in to get circumference
C = 3.14 (2)
C = 6.28
and the equation for area uses radius not diameter but we know that d/2=r so radius is 1, plug in to solve
A = 3.14 (1)^2
A = 3.14 (1)
A = 3.14
Hope this helps! :)
Directly proportional or positively correlated
Answer:
- 96
- 6.9
- 25%
- 8%
- 79
- 33.8
Step-by-step explanation:
Here is the complete question: Find each number. Round to the nearest tenth if necessary.
- 80% of 120.
- 115% of 6
- What percent of 128 is 32?
- 3 is what percent of 36?
- 23.7 is 30% of what number?
- 71/2% of what is 12?
1) 80% of 120
= ![\frac{80}{100} \times 120= 8\times 12](https://tex.z-dn.net/?f=%5Cfrac%7B80%7D%7B100%7D%20%5Ctimes%20120%3D%208%5Ctimes%2012)
= 96
∴ 80% of 120= 96
2) ![115\%\ of\ 6](https://tex.z-dn.net/?f=115%5C%25%5C%20of%5C%206)
=![\frac{115}{100}\times 6= 1.15\times 6](https://tex.z-dn.net/?f=%5Cfrac%7B115%7D%7B100%7D%5Ctimes%206%3D%201.15%5Ctimes%206)
∴
= 6.9
3) What percent of 128 is 32?
= ![\frac{32}{128} \times 100](https://tex.z-dn.net/?f=%5Cfrac%7B32%7D%7B128%7D%20%5Ctimes%20100)
= ![25\%](https://tex.z-dn.net/?f=25%5C%25)
4) 3 is what percent of 36?
= ![\frac{3}{36} \times 100](https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7B36%7D%20%5Ctimes%20100)
= ![8\%](https://tex.z-dn.net/?f=8%5C%25)
5) 23.7 is 30% of what number?
Let the number be "x".
⇒ ![\frac{30}{100} \times x= 23.7](https://tex.z-dn.net/?f=%5Cfrac%7B30%7D%7B100%7D%20%5Ctimes%20x%3D%2023.7)
Cross multiplying
⇒ ![x= \frac{23.7\times 100}{30}](https://tex.z-dn.net/?f=x%3D%20%5Cfrac%7B23.7%5Ctimes%20100%7D%7B30%7D)
∴ x= 79.
6) 71/2% of what is 12?
Lets assume the required number be "x".
⇒ ![\frac{71}{2} \times 100\times x= 12](https://tex.z-dn.net/?f=%5Cfrac%7B71%7D%7B2%7D%20%5Ctimes%20100%5Ctimes%20x%3D%2012)
cross multiplying both side.
⇒x= 33.8
∴ 71/2% of 33.8 is 12
Answer:
C) 118.8; 28.8
Step-by-step explanation:
for eating, it didn't make sense for it to be 288 degrees, so i eliminated the two off the list. For sleeping, it made more sense for it to be a 118.8 degree angle, so I narrowed it down to C.
<h3><u><em>
Answer:</em></u></h3><h3><u><em>
30</em></u></h3><h3><u><em>
Step-by-step explanation:</em></u></h3><h3><u><em>
Answer: 30 gallons</em></u></h3><h3><u><em>
</em></u></h3><h3><u><em>
Step-by-step explanation:</em></u></h3><h3><u><em>
</em></u></h3><h3><u><em>
So fist we add 40% and $40%. That's 80 percent of the tank which is 12 + 12 = 24. </em></u></h3><h3><u><em>
Then we figure out half of 40 percent which is 20 which means its 6 gallons. </em></u></h3><h3><u><em>
Now we add. 12+12+6 which equals our answer 30 gallons</em></u></h3><h3><u><em>
</em></u></h3>
<u><em></em></u>