Aresearcher wishes to investigate differences in college admission rates between students at two high schools. she randomly select 100 students from the 200 seniors at school a and 100 students from the 300 students at school b. what sampling method did she use?
cluster
stratified
simple random
systematic

What value of x will make the triangles similar by the sss similarity theorem?

At the beginning of the day, stock xyz opened at $6.12. at the end of the day, it closed at $6.88. what is the rate of change of stock xyz? a. 1.17% b. 11.0% c. 12.4% d. 81.5%

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =