Seth is planning to invest $20,000 of his money. He is investing it in two banks. Seth invested $7,000 in Bank A; which gives an interest rate of 4%. If Seth wants to accumulate $1,280 in interest after one year, what interest rate must Bank B offer for Seth to accomplish this yield? A.9.69%
B.6.69%
C.8.69%
D.7.69%

8

step-by-step explanation:

just put √(2) * √(32) into a calculator. that will make the answer be 8.

mean, 40.6

step-by-step explanation:

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c