4. A science student put together the following formula that can calculate the height, in feet,
of a water bottle rocket by using the number of seconds after the launch, X.
f(x) = –2x2 + 11x + 15
How high will the rocket be off the ground 3 seconds after it is launched?

What is the fewest number of full weeks briyana would have to work to have enough money? 8 weeks9 weeks 10 weeks11 weeks

Need on this one asap im almost done with this subject

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.