What is the average rate of change of the population between 1930 and 1950 show reasoning

Robin spent 25% more time on his research project than he had planned he’s been an extra h ours on the project which of the following expressions could represent the number of hours rob actually spent on the project

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?

B. two events are dependent if the occurrence of one event changes to occurrence of the second event. true or false