Serena is playing a video game. She begins with 2 coins. Every hour that she plays, her coins double. How many coins will Serena have after playing for two hours?
Please help i will give brainliest

Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?