Which of the following is a valid exclusion for the algebraic fraction: (27a^3-1) / (9a^2-6a+1)? a. a≠0 b. a≠1 c. a≠1/3 d. a≠3

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.