The bus driver arrives in Oban at 11:20
Use the formula i=prt, where i is the interest earned, p is the principal, r is the rate (as a decimal fraction) and t is the elapsed time, in years.
Here i = $72 = $1200 r (9/12) (9 months is 9/12, or 3/4, of 1 year)
Reducing,
$72 = $900r
Solving for r, r=0.08, or 8 percent per year.
6 is the square root of 36 and is divisible by 2 and 6.
5×9/10=4.5
9/10 1 8/10 2 7/10 3 6/10 4 5/10
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5 5/10=4 1/2=4.5