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What is the celsius temperature that is equal to 94 degrees fahrenheit using the formula f=9/5 c+32

I'm confused on this could anyone me and show me what i need to do to solve it.

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