Let A(x) denote the number (in hundreds) of computers sold when x thousand dollars is spent on advertising. Represent the following statement by equations involving A or A': When two thousand dollars were spent on advertising the number of computers sold was 1200 and it was rising at the rate of 30 computers for each 1000 dollars spent on advertising. (b) Estimate the number of computers that will be sold if $3000 is spent on advertising. (a) Which equations best represent the statement? A. A(2) = 12 and A'(2) = -0.3 B. A(2) = 0.3 and A'(2) = 12 C. A(2) = -0.3 and A'(2) = 12 D. A(2) = 12 and A'(2) = 0.3

Determine if the following statement is true or false. the normal curve is symmetric about its​ mean, mu. choose the best answer below. a. the statement is false. the normal curve is not symmetric about its​ mean, because the mean is the balancing point of the graph of the distribution. the median is the point where​ 50% of the area under the distribution is to the left and​ 50% to the right.​ therefore, the normal curve could only be symmetric about its​ median, not about its mean. b. the statement is true. the normal curve is a symmetric distribution with one​ peak, which means the​ mean, median, and mode are all equal.​ therefore, the normal curve is symmetric about the​ mean, mu. c. the statement is false. the mean is the balancing point for the graph of a​ distribution, and​ therefore, it is impossible for any distribution to be symmetric about the mean. d. the statement is true. the mean is the balancing point for the graph of a​ distribution, and​ therefore, all distributions are symmetric about the mean.