For this we almost have the following equation:
![h = -16t ^ 2 + 25 ](https://tex.z-dn.net/?f=h%20%3D%20-16t%20%5E%202%20%2B%2025%0A)
We must match the equation to zero:
![-16t ^ 2 + 25 = 0 ](https://tex.z-dn.net/?f=-16t%20%5E%202%20%2B%2025%20%3D%200%0A)
From here, we clear the value of t.
We have then:
![16t ^ 2 = 25 t ^ 2 = 25/16](https://tex.z-dn.net/?f=16t%20%5E%202%20%3D%2025%0A%0At%20%5E%202%20%3D%2025%2F16)
We discard the negative root because we are looking for time:
Answer:
it will take him to reach the ground about:
![t = \frac{5}{4}](https://tex.z-dn.net/?f=t%20%3D%20%5Cfrac%7B5%7D%7B4%7D%20)
seconds
Answer:
![\frac{8}{45}](https://tex.z-dn.net/?f=%5Cfrac%7B8%7D%7B45%7D)
Step-by-step explanation:
convert mixed number to improper fractions
3
=![\frac{15}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B15%7D%7B4%7D)
![\frac{\frac{2}{3} }{\frac{15}{4} }](https://tex.z-dn.net/?f=%5Cfrac%7B%5Cfrac%7B2%7D%7B3%7D%20%7D%7B%5Cfrac%7B15%7D%7B4%7D%20%7D)
apply the fraction rule:
![\frac{2 * 4}{3 * 15}](https://tex.z-dn.net/?f=%5Cfrac%7B2%20%2A%204%7D%7B3%20%2A%2015%7D)
multiply the numbers
![\frac{8}{45}](https://tex.z-dn.net/?f=%5Cfrac%7B8%7D%7B45%7D)
Answer:
1 7/8 quarts
Step-by-step explanation:
The amount Yuan has left can be found by multiplying the original amount by the fraction he has left.
__
<h3>used</h3>
After using 1/2 of the broth for soup, the fraction remaining is ...
1 -1/2 = 1/2
The amount Yuan used for gravy is 1/4 of this, or ...
(1/4)(1/2) = 1/8 . . . of the original amount of broth
The total fraction Yuan used was ...
fraction used = fraction for soup + fraction for broth = 1/2 +1/8 = 5/8
<h3>remaining</h3>
Then the fraction remaining is ...
fraction remaining = 1 - fraction used = 1 - 5/8 = 3/8.
The amount remaining is this fraction of the original amount:
(3/8)(5 quarts) = 15/8 quarts = 1 7/8 quarts . . . . remaining
The human body has about 5.5 liters of blood
3 deciliters is about 0.3 liters
so 5.5/0.3=18.33333
so she could fill 18 and 1/3 glasses before she died
wait
oooooh, she has a supply of blood other than her own, nvm, I should read better
1 decileter is 1/10 of a liter
so 3/10 of a liter per glass
6 of those 2 liter bottles
so total is 6*2=12 liters
so
3/10 times number of glasses=12
times both sides by 10/3
number of glasses=120/3
number of glasses=40
can fill 40 glasses with the blood she is supplied (not including her own)
Answer:
D
Step-by-step explanation: