Coffee and nicotine can be lethal in large doses. a. true b. false

True - Nicotine is lethal at 0.5-0.1 mg/kg (it would be very difficult to overdose on smoking alone. However, if a child were to ingest as little as 6 mg of nicotine they could potentially die. For coffee, it would take about 70 cups of coffee to kill a person weighing about 154 lbs. However, it is the Caffeine in coffee that would kill you not the coffee itself. ( idk if your teacher would be picky about the wording)  For example, decaffeinated coffee would need a much much larger dose to kill a human with caffeine intake.

True is the answer to this question

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.