1. What are the mean, median, mode, and range of the data set 18, 19, 20, 21, 23, 26.26.26? a. mean = 22.4, median = 22: mode = 26 b. mean = 22.4: mellan 26 mode = 22 c. mean = 26: median = 22.4: mode = 24 d. mean = 23.4: median 22: mode = 26 ​

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.