The curve y = 2x^3 + ax^2 + bx + 7 has a stationary point at the point (2,-13). a Find the value of a and the value of b.
b Find the coordinates of the second stationary point on the curve.
c Determine the nature of the two stationary points.
d Find the coordinates of the point on the curve where the gradient is minimum
and state the value of the minimum gradient.​

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80

$655.61 which is option c

step-by-step explanation:

price of house =   $146,000

initial rate = 3.5%

mortgaged paid in this = 3.5 % of $146,000

                                        =

                                        =$5110

the total years would be = 7

total mortgaged paid = 7 * $5110

                                      =$35770

remaining money = $146000-35770

                                =$110230

new mortgaged payment = 5 % of 110230

                                            =  

                                            =$655.61