Jacob is taking a multiple-choice test with 4 questions. For each question there are 3 different answers: A, B, and C. Jacob forgot study for the test so he is just going to guess the answers. (a) Jacob will guess an answer for each of the 4 questions. In how many different ways could he fill out the answer sheet? 12 (b) Jacob's teacher gives the students in the class the option leaving any (or all) of questions unanswered if a student unsure of the answer. In how many different ways can Jacob fill out the answer sheet if he has the option of leaving as many questions as he likes unanswered? 15

I cannot see how the problem was done, it was hidden behind the box. Can it please be edited or redone so I can see what the answer is and how it was gotten?

Can you write part a a bit more clearly. I can't understand what's happening where you are eliminating

can you work it out step by step

I bought a new gas lawn mower the other day. This new mower mows faster than the old electric (environmental) one. Why, you ask? It is because the old mower cut a 21 inch path, while the new one cuts a 22 inch path. So how much time did I save? Look at some facts. My lawn is a rectangle measuring 150 feet by 105 feet I mow the lawn in strips and always in the same direction (length or width) My walking speed is 120 feet/minute It takes 5 seconds to turn around after each strip How much time did I save if I mow back and forth along the width or if I mow back and forth along the length? Pick one and figure it out. My neighbor does not like minutes the noise it makes, but I do!

I don't understand how part is broken down

Another question that's really throwing  me off please help.

Can you explan it better?  I do not understand.

not sure where I'm going wrong..

please list a clear answer for each part of the question