Dental assistant a says a child's first dental visit should be around the age of 4, when children start to brush their own teet. dental assistant b says a child's first visit should be around the age of 2. which assistant is correct?

I would say dental assistant B because, The American Academy of Pediatric Dentistry (AAPD) recommends that a child go to the dentist by age 1 or within six months after the first tooth erupts. Primary teeth typically begin growing in around 6 months of age.

Ok , hopefully this app

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.