Jill made the model below to show the quotient 1 . 28 ÷ 4 . an image shows three groups of three tenths and two hundredths. which of the following explains the mistake jill made? a. jill used 3 groups of 3 tenths and 2 hundredths rather than 4 groups. b. jill used groups of 3 tenths and 2 hundredths rather than groups of 4 tenths. c. jill used 3 groups of 3 tenths and 2 hundredths rather than 2 groups. d. jill used groups of 3 tenths and 2 hundredths rather than groups of 3 tenths and 8 hundredths.

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

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.