The sphere. All the others are prisms.
The answer would be 3.8.
So, to get 3 to 4, you would have to multiply 3 by something to get to 4. So you would divide 4 by 3 and get 1.3. So then you would divide 5 by 1.3 to solve for k, since k times 1.3 equals 5.
5 ÷ 1.3 = 3.8.
Draw the parabola and see if the parabola matches the main curve
Answer:
Easy multiply twenty times four you'll get your answer