Sidney has two different acid solutions: A is a 50% acid solution, and B is an 80% acid solution. Determine how much of each solution he needs to
create 200 ml of a 68% solution.

80 ml of the first solution and 120 ml of the second solution

Step-by-step explanation:

Let the first solution weigh x ml, let the second solution weigh 200-x ml.

The amount of acid in the first solution is x/100*50=0.5x

The amount of acid in the second one is (200-x)/100*80= 160-0.8x

The quantity of acid in the desired mixture is 200/100*68= 136

0.5x+160-0.8x= 136

0.3x=24

x=80ml of the first solution are needed

200-80=120ml - of the second solution are needed

spinning a 1, 2, or 3. option d.

step-by-step explanation: when spinning a number graph up to 4, and aiming for any number less than 3, that automatically eliminates the number 4. now you have two numbers to spin on that are less than 3, but the number 3 is included in this question because it's no greater of an number than itself. i hope this you : )

the population of other specie of birds will decline or other specie of birds will find some alternate source of food to survive.

explanation:

according to the competitive exclusion principle, which is also known as gause's law, two specie living in the same niche and feeding on the same resource cannot co-exist stably.

as we have well studied the theory of natural selection which states that only those organisms survive which have better tendency to compete for food and adapt to the environmental conditions.

coming towards the question, what wi ll happen when one species outcompetes the other for the small fish , the other specie will not get enough food and will start to die or decline in population. eventually either other specie needs to find another alternative food source for itself or migrate at some other location where there is less competition otherwise it will just not exist anymore at that niche.

hope it !