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7. Using Newton's Method with an initial guess x. . 2, find the exact values of x, and x2, which are successive rational approximations of the solution to x' + 2x-7 - 0. Write down the expressions for x, and x, , but use your calculator for all the arithmetic to get the fractions correct. 8. Water is draining from the point at the bottom of a conical tank at a rate of 8 cubic meters per minute. If the tank has a 3-meter radius at the top and a 5-meter height, how fast is the height of the water changing when the water is 2 meters deep?| Volume of a Cone: V = tarth 9. By hand, use the Midpoint Rule with 4 subintervals to find a rational approximation for the area under the curve f (x) - 3x on the interval from x