when ryan runs the 400 m dash his finishing times are normally distributed with a mean of 75 seconds in your standard deviation of 0.5 seconds use in the empirical rule, determine the interval of times that represents the middle 68% of his finishing times in the 400 m race

Given the function f(x) = 3x + 1, evaluate f(a + 1). a. 3a + 1 b. a + 2 c. 3a + 4

Find the value of x. give reasons to justify your solutions! l, m ∈ kn

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.