1 1/4 miles in 2 min and 4 seconds, or 1 3/16 miles in 1 min and 55 sec. Which is greater?

Question

$1.60 for 5 min or $19.50 for 1 hour. Which is greater?

Look for a pattern in the expressions shown below. Use the pattern to write an expression for the sum of the whole numbers from 1 to n. then find the sum of the whole numbers from 1 to 50.
1+2=2•3/2. 1+2+3=3•4/2. 1+2+3+4=4•5/2.

Answer 1

1.25 / 124 = 0.0100806 miles/second
1.1875 / 115 = 0.010326 miles per second

The first is faster.

1.6/5 = $0.32 per minute
19.50/60 = 0.325 per minute