SOMEBODY PLEASE HELP. I HAVE WORK IN THE MORNING. A archer releases an arrow with an initial velocity of 30 feet per second at a height of 3 feet. The path the arrow takes
can be modeled using the function f(x) = -16x² + 30x +3, where f(x) represents the height, in feet, of the arrow
and a represents the time the arrow travels in seconds. How many seconds until the arrow hits the ground? Round
your answer to the nearest hundredth if necessary.

Someone me! if you’re smart you can solve this!

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

Stu and ambrose are working together on a study of whether diet is related to students' mental health. first, they randomly select 10 students from the student center and 10 students from the office of counseling and psychological services. then, they ask students to rate their diet in terms of healthiness on a scale of 1-100 before completing a 20-item mental health survey. a) name one of the constructs being studied b) how was the construct you named above operationally defined in this experiment? e) was the variable you described above their independent variable, their dependent variable, or a controlled variable? d) what is a confounding variable? what is a potential confound in this study?