Which function g represents the exponential function f(x) = 5^x after a vertical stretch by a factor of 3 and a reflection across the y-axis?

Fatima plans to spend at least $15 and at most $20 dollars on sketch pads and pencils. if she buys 2 sketchpads, how many pemcils can she buy while staying in her price range? fatima can buy between and pencils. ? (type whole numbers. use ascending? order.)