Determine the number that must be added to make each of the following a perfect square trinomial.

1. x² + 2x +

2. r² + 2r +

3. x² - 15x +

11. a particular type of cell doubles in number every hour. which function can be used to find the number of cells present at the end of h hours if there are initially 4 of these cells? a. n = 4 ()" b. n = 4(2)" c. n = 4 + (2)" din = 4 +"

Can someone me do math because i am having a breakdown rn because i don’t get it

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.