Which of the following sentences is most appropriate for written communication at work or with a customer? a)dude, i just know our new product will make you lol when i demonstrate it for : ) b)i’ll be happy to dog-and-pony a demo of our new xvg just as soon as we can get a space on the corpcal. c)i cannot tell you how i will be to hear from you, at any time that you choose to contact me, if you would like to spend any amount of time at our office or at your workplace viewing a thrilling demonstration of our spectacular new product. d) contact me when you’re ready for a demonstration of our new product.

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.