In order to complete an experiment in chemistry lab, sylvia needs to make a mixture of 130 ml of a 37% base solution from a 67% base solution and a 24% base solution. find the volume of the 67% base solution that sylvia needs to use to make the mixture.
find the volume of the 67% base solution.

The volume of the 67% Base solution is 39.30 mL

Explanation:

Let the volume of 67% base solution used to make the mixture = x mL

Let the volume of 24% base solution used to make the mixture = y mL

Total volume of the mixture = x + y = 130 mL (1)

For 67% base solution:

C₁ = 67% , V₁ = x mL

For 10% base solution:

C₂ = 24% , V₂ = y mL

For the resultant base solution:

C₃ = 37% , V₃ = 50 mL

Using  

C₁V₁ + C₂V₂ = C₃V₃

67×x + 24×y = 37×130

So,  

67x + 24y = 4810 (2)

Solving 1 and 2 we get,

x = 39.30 mL

y = 90.70 mL

when—without warning—something provokes your anger, you may struggle not to succumb to it. since what typically makes you mad is feeling powerless in the face of what seems unfair, your anger is mostly an attempt at a “quick fix” to right the balance. it’s as though you’re raising a fist in protest, proclaiming that you’re not going to capitulate to such injustice.

there are, however, a multitude of problems related to this immediate, push-back reaction of anger. and probably the key one is that almost never does it resolve the issue that gave rise to it. such reactive anger is probably best understood as self-defeating. as david burns, the author of the seminal self- book feeling good, observes: if realistically, acting on your anger is to make any sense, it needs to meet two criteria—which, in almost every case, is frankly impossible. that is, your anger must:

be directed toward a person who has intentionally (and needlessly) behaved in a hurtful way toward you; and

be beneficial or advantageous to you (i.e., assist you in achieving a desired goal).

i think you’ll agree that only rarely can you claim that your anger is both warranted and , whether to yourself or the relationship.

so let me offer you a two-step alternative to abandoning your better judgment and giving in to the temptation of anger—one that should neutralize your anger in seconds. or, when you’re really angry, in minutes.

but keep in mind that you must really want to execute these steps, be sufficiently motivated to perform them. which means overcoming more unconscious resistance than you might ever have imagined. because there are many immediate “advantages” of anger that can interfere with your resolve, i’ll suggest a few of them that might interfere with your employing this powerful method to rid yourself of counter-productive anger.

explanation:

the answer is definitely c.