Atennis player lands 25 out of 40 first serves in bounds for a success rate of 62.5%. how many more consecutive first serves must she land in bounds to increase her success rate to 70%.

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x

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

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?