There where 10 black bears in an area. some years later there where 17 black bears in the area what is the percentage increase

For this case we have to find the percentage increase in black bears. For this, we make a rule of three:

10 -----------------> 100%

17 -----------------> x

Where "x" represents the current percentage of bears.

We subtract to know the percentage of increase:

Thus, the bear population increased 70%

70%

x = ± 6i

step-by-step explanation:

x^2 = -36

take the square root of each side

sqrt(x^2) = sqrt(-36)

we know sqrt(ab) = sqrt(a) sqrt(b)

x = ±sqrt(36) sqrt(-1)

we know that sqrt (-1) = i

x = ± 6i

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: