Dr. Goldberg believes people are introverted because of their early social experiences. Dr. Smith believes that people are introverted because of genetic factors. Dr. Goldberg and Dr. Smith are
engaged in which ongoing debate?
Cognition versus emotion
Classical versus operant conditioning
Genetics versus socialization
Cross-sectional studies versus longitudinal studies
Nature versus nurture

Answerthe distance to nearby stars;

You need to figure out at which x-value does the graph has a tangent line slope of -1.remember, the derivative is the slope of the tangent line. so find the derivative function and set it to equal -1 to find the x-value that will have a tangent line slope of 0.differentiate with the chain rule.    set the derivative to equal -1 and solve for x.      take log base 10 of both sides. also recall that  .    so the x-coord of the point of tangency is .the y-coordinate of this point of tangency can be calculated using the original function:     using point-slope form, the equation of the tangent line is      the x-intercept of this tangent line is when the graph is at y=0.    this rounds off to  .choice c.