You went to the post office with 20 dollars. you mailed a package for 3.67. at most how many $.37 stamps could you buy

i believe the answer is c.

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