A 4-person grievance committee is to be selected out of 2 departments, a and b, with 12 and 30 people, respectively. in how many ways can the following committees be selected? complete parts (a) through (e) below. (a) 3 from a and 1 from b 6600 (b) 2 from a and 2 from b 28710 (c) all from a 495 (d) 4 people regardless of department 111930 (e) at least 3 from department a nothing

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

What is the area of the triangle 10 13 12

Given abc find the values of x and y. in your final answer, include all of your calculations.