The following are helpful in managing your time: A. Avoiding the telephone

B. Studying in a very comfortable place, such as your bed or a sofa

C. waiting time (bus stop, doctor's office, grocery store line) to review study
materials

D. Both a and c are correct

D because avoiding the telephone helps you manage time for yourself so you can be able to study and C to because while your waiting to put in thag extra effort to do you work while waiting just get more done is also really helpful that’s why it is D

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.