At the beginning of a snowstorm, Alexandra had 7 inches of snow on her lawn. The snow then began to fall at a constant rate of 2.5 inches per hour. Assuming no snow was melting, how much snow would Alexandra have on her lawn 3 hours after the snow began to fall? How much snow would Alexandra have on her lawn after tt hours of snow falling?

Answer 1

Three hours after the snow began to fall, Alexandra would have 7 + 2.5 * 3 = <<7+2.5*3=15.5>>15.5 inches of snow on her lawn.
After tt hours of snow falling, Alexandra would have 7 + 2.5 * tt inches of snow on her lawn. Answer: \boxed{7 + 2.5tt}.

Answer 2

Snow on lawn after 3 hours:
Snow on lawn after tt hours:

Answer 3

Snow on lawn after 3 hours: 15.5 inches
Snow on lawn after tt hours: 7 + 2.5tt inches