-7 (3e-2f+4)+6e-2 can you please help me solve this?
1 answer:
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Answer:
Step-by-step explanation:
x is the number of years. y is the population after x years.
Each year, the population decreases by 22%, since 100% - 22% = 78%, and 78% = 0.78, each year, the population is 0.78 of the previous year's population.
year zero: y = 300
year 1: y = 300 * 0.78 = 300 * (0.78)^1
year 2: y = (300 * 0.78) * 0.78 = 300 * (0.78)^2
year 3: y = ((300 * 0.78) * 0.78) * 0.78 = 300 * (0.78)^3
year x: y = 300(0.78)^x
Answer:
C.
and
Step-by-step explanation:
You have the quadratic function to find the solutions for this equation we are going to use Bhaskara's Formula.
For the quadratic functions with
the Bhaskara's Formula is:
It usually has two solutions.
Then we have where a=2, b=-1 and c=1. Applying the formula:
Observation:
And,
Then the correct answer is option C.
and