William works at a nearby electronics store. he makes a commission of 8%, on everything he sells. if he sells a laptop for $773.00, how much money does william make in commission?

Need on this one asap im almost done with this subject

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41