Aprofessor states that in the united states the proportion of college students who own iphones is .66. she then splits the class into two groups: group 1 with students whose last name begins with a-k and group 2 with students whose last name begins with l-z. she then asks each group to count how many in that group own iphones and to calculate the group proportion of iphone ownership. for group 1 the proportion is p1 and for group 2 the proportion is p2. to calculate the proportion you take the number of iphone owners and divide by the total number of students in the group. you will get a number between 0 and 1.

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)

On the way home from visiting his family, vincent’s plane cruised at an altitude of 3.2 × 10^4 feet. he had heard that a man named felix baumgartner skydived from an altitude of 1.28 × 10^5 feet. vincent wants to know how much higher felix went on his skydiving trip. question 1 you have already seen how adding numbers works in either scientific notation or standard notation. but can you subtract numbers in scientific notation and get the same results as subtracting in standard notation? to find out, first solve vincent’s problem in standard notation. part a write the cruising altitude of vincent’s plane in standard notation.