For males in a certain town, the systolic blood pressure is normally distributed with a mean of 130 and a standard deviation of 5. If 421 males from the town are randomly selected to participate in a study, how many of them would be expected to have a systolic blood pressure less than 128, to the nearest whole number?​

Dexter read 11 science fiction books and 5 history books. lena read 9 science fiction books and 4 history books. compare the students’ ratios of science fiction books to history books. 1. determine the ratios’ form:    science fiction books to history books 2. write the ratios as fractions:    dexter: 115; lena: 94 3. rewrite with a common denominator. 4. compare. 5. answer the question. determine which shows the correct comparison of the ratios for this problem.

Evaluate 3(a + b + c)squared for a = 2, b = 3, and c = 4. a. 54 b. 243 c.729 add solution .

Identify the number 127 as a rational or irrational. explain