We have been given the coordinates of a point and we are asked to find the coordinates of he point after a counterclockwise rotation of 90º about the origin.
We know that after rotating a point 90 degree counter-clockwise about the origin, the x and y-coordinates changes places with each other and x-coordinate of new point becomes the negative of y-coordinate.
Applying the rotation rule the coordinates of new point would be:
Therefore, the required coordinates of the given point after a counterclockwise rotation of 90º about the origin would be .
Most credit card companies also apply a late payment penalty if you owe a balance and do not make a payment. Ignoring that fee, Miriam's balance will increase as:
B(n) = 750(1.018)^n
where B(n) is Miriam's balance after n months. The progression will be: