pls help. any sus links will be flagged as there is a info grabber using links to supposed anwsers to grab nfo

If 20% of a number is 35, what is 50% of that number?

Which of the following is true for the relation f(x)=2x^2+1

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