Answer:
10. B
13. It's actually 30 seconds but 20 comes closest so B
14. B, any type of stretching is good before you perform any type of physical activity because it loosens up the muscles
15. D, all of the above
Explanation:
I have done many sports in my life and am still very active, I grew to know most of these things through the years.
Explanation:
In one day a scientist can travel = 80 km
In 10 days. a scientist can travel = 80* 10
= 800 km.
Answer:
d = 90 ft
Explanation:
As we know that after each bounce it reaches to 4/5 times of initial height
so we can say
![h_2 = \frac{4}{5}h](https://tex.z-dn.net/?f=h_2%20%3D%20%5Cfrac%7B4%7D%7B5%7Dh)
so the distance covered is given as
![d = h + 2(\frac{4}{5}h) + 2(\frac{4}{5})^2h + 2(\frac{4}{5})^3h........](https://tex.z-dn.net/?f=d%20%3D%20h%20%2B%202%28%5Cfrac%7B4%7D%7B5%7Dh%29%20%2B%202%28%5Cfrac%7B4%7D%7B5%7D%29%5E2h%20%2B%202%28%5Cfrac%7B4%7D%7B5%7D%29%5E3h........)
here we know that
h = 10 feet
![d = h + 2(\frac{4}{5}h)(1 + \frac{4}{5} + (\frac{4}{5})^2 + ...........)](https://tex.z-dn.net/?f=d%20%3D%20h%20%2B%202%28%5Cfrac%7B4%7D%7B5%7Dh%29%281%20%2B%20%5Cfrac%7B4%7D%7B5%7D%20%2B%20%28%5Cfrac%7B4%7D%7B5%7D%29%5E2%20%2B%20...........%29)
![d = 10 + 2(\frac{4}{5}(10))(\frac{1}{1 - \frac{4}{5}})](https://tex.z-dn.net/?f=d%20%3D%2010%20%2B%202%28%5Cfrac%7B4%7D%7B5%7D%2810%29%29%28%5Cfrac%7B1%7D%7B1%20-%20%5Cfrac%7B4%7D%7B5%7D%7D%29)
![d = 90 ft](https://tex.z-dn.net/?f=d%20%3D%2090%20ft)
The force that holds the gases in the sun. The force that causes a ball you throw in the air to come down again
Answer:
Gypsum
Explanation:
Gypsum is a soft sulfate mineral composed of Calcium Sulfate di-hydrate. It is widely used in composition of fertilizer. It is also known as land plaster. On adding gypsum to soil, the quality of soil is improved. It conditions the soil and adds nutrients. The properties of soil is improved. Hence, the correct answer is Gypsum.
Hope this helped:)
pls mark brainlist