7. An object moves along a plane such that the x- and y-coordinates of its velocity are defined by the functions vx (t) = 3t^2 - 3 and vy (t) = 2t^2 - 8. At what
time is the object's velocity purely horizontal?

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures

answer(20) psi;