Which phrases describe the relationship between heart rate and intake of coffee

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Kari plans to sample 20 people of a population that contains 100 students. she wants to determine how many people wake up before 6 a. m. which sample is the most random?