Nora created a tiled mosaic for display in her local art museum. The number of tiles in the first 18 rows of the mosaic form an arithmetic sequence. The first row of the mosaic has 5 tiles and the second row had 8 tiles. A. Write a explicit formula representing this sequence

B. Determine the number of the tiles in the 14th row

ANSWERS:

A. an=5+3(n-1);44 tiles

B. an=3+5(n-1); 48 tiles

C. an=3+5(n-1);44 tiles

D. an=5+3(n-1);48 tiles

Show your work please!!! Thanks

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.