Could somebody solve a and c for me? Please help!

Timed***how else can the sequence for row 1 be written? notice: square a: 1 penny = 20 square b: 2 pennies = 21 square c: 4 pennies = 22 the sequence formed is geometric, with a1 = , and common ratio r = .

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

What is equal to n in this equation