Acircle has its center at (-1, 2) and a radius of 3 units. what is the equation of the circle?
a) (x - 1)2 + (y + 2)2 = 3
b) (x + 1)2 + (y - 2)2 = 3
c) (x + 1)2 + (y + 2)2 = 9
d) (x + 1)2 + (y - 2)2 = 9

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 +"

Which of the following is the graph of y= square root -x-3

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth