Write the vector u as a sum of two orthogonal vectors,
one of which is the vector projection of u onto v

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4

Just tell me how to set up the equation.