An ecologist wishes to mark off a circular sampling region having radius 10 m. however, the radius of the resulting region is actually a random variable r with the following pdf.
f(r) = 3/4
1 − (14 − r)2
0
13 ≤ r ≤ 15
what is the expected area of the resulting circular region?

What are the soultion(s) to the quadratic equation 40- x^2=0

Identify which functions are linear or non-linear. a. f(x) = x2 + 1 b. f(x) = 2x + 5 c. f(x) = x 2 + 3 d. f(x) = 3 x + 7 e. f(x) = 4x + 10 2 - 5

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.