Aball is thrown in the air from the top of a building. its height, in meters above ground, as a function of time, in seconds, is given by h(t)=−4.9x2+19.6x+24.
a. how long does does it take for the ball to reach its maximum height?
b. what is the maximum height of the ball?

Y=4x^2+x-1 solve using quadratic formula

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.

286 divided by 457.6 what is the quotient?