540 attempts times 30% so 540 * .30 = 162. the answer is 162.
Its 15/30
a completely equal chance
Answer:
355 milliliter.
Step-by-step explanation:
Given:
A certain drug is made from only two ingredients: compound A and compound B.
There are 5 milliliters of compound A used for every 4 milliliters of compound B.
If a chemist wants to make 639 milliliters of the drug, how many milliliters of compound A are needed ?
Solution:
<u>As 5 milliliters of compound A is used for every 4 milliliters of compound B.</u>
Ratio of compound A and compound B = 5 : 4
Let ratio be ![x](https://tex.z-dn.net/?f=x)
Quantity of compound A in milliliter = ![5x](https://tex.z-dn.net/?f=5x)
Quantity of compound B in milliliter = ![4x](https://tex.z-dn.net/?f=4x)
Now, we have to make 639 milliliters of the drug,
<u>Quantity of compound A + Quantity of compound B = 639 milliliters</u>
![5x+4x=639\\9x=639\\](https://tex.z-dn.net/?f=5x%2B4x%3D639%5C%5C9x%3D639%5C%5C)
Dividing both sides by 9
![x=71](https://tex.z-dn.net/?f=x%3D71)
Quantity of compound A in milliliter =
= ![5\times71=355\ mililiters](https://tex.z-dn.net/?f=5%5Ctimes71%3D355%5C%20mililiters)
Therefore, 355 milliliter of compound A are needed to make 639 milliliters of the drug.
Answer:
different between the two are that they are am and pm
The beam of light hit the dolphin at the common point that is the solution of a system:
.
From the second equation express y: y=10-x and substitute it into the first equation:
.
Therefore, the horizontal distance in feet is x=5 ft and the height above water is y=10-5=5 ft.
Answer: the beam of light hit the dolphin at 5 ft above water