Mathematics, 01.03.2021 21:30, sabrinamarie17
An environmental engineer measures the amount (by weight) of particulate pollution in air samples of a certain volume collected over two smokestacks at a coal-operated power plant. One of the stacks is equipped with a cleaning device. Let Y1 denote the amount of pollutant per sample collected above the stack that has no cleaning device and let Y2 denote the amount of pollutant per sample collected above the stack that is equipped with the cleaning device. Suppose that the relative frequency behavior of X and Y can be modeled by:
f(x, y)=1; 0 ≤ x ≤ 2, 0 ≤ y ≤ 1, 2y ≤x
0 elsewhere
a. Find the covariance between X and Y.
b. Find the correlation between X and Y.
c. Find the expected value and variance of X - Y, the amount of pollutant removed by the cleaner.
Answers: 2
Mathematics, 21.06.2019 14:30, jadaroyval
Is fgh ~ jkl? if so, identify the similarity postulate or theorem that applies.
Answers: 1
Mathematics, 21.06.2019 15:00, maraa013001
Use addition and subtraction to simplify the following polynomials. a. add polynomials: (3 – 4x + 8x^2) + (–6 + 2x – 5x^2) step 1: rewrite the polynomials without the parentheses. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial. b. subtract polynomials: (3x – 5 – 7x^2) – (–2 + 6x^2 – 5x) step 1: rewrite the polynomials without the parentheses. remember to multiply each term in the second parentheses by –1. show your work. step 2: write the polynomial in descending order and use parentheses around like terms. step 3: add the like terms identified in step 2 to simplify the polynomial.
Answers: 3
Mathematics, 22.06.2019 00:30, natalie857123
Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i
Answers: 1
An environmental engineer measures the amount (by weight) of particulate pollution in air samples of...
English, 15.08.2020 05:01