B. 57,800
14,300+14,400+14,500+14,600=$57800
When multiplying numbers a negative number will make a positive into a negative. Yet if multiplied again by another negative it will cancel out or make it positive again. Seeing as answer c has only one negative it's the correct answer.
Step-by-step explanation:
a = 2 + 3a + 8
a = 10 + 3a
a - 3a = 10
-2a = 10
a = -5
Answer:
It will take 5 hours until it reaches its maximum concentration.
Step-by-step explanation:
The maximum concentration will happen in t hours. t is found when

In this problem

Applying the quotient derivative formula



A fraction is equal to zero when the numerator is 0. So





We use only positive value.
It will take 5 hours until it reaches its maximum concentration.
Are there any multiple choice answers?