<PRE><B>Question 526400</B>
B) Randy Johnson had an ERA of 2.64 in 2000.
 At this rate, how many runs would he be expected to allow in 100 innings pitched?
:
let r = no. of runs
:
The formula: Runs, divided by innings pitched, times 9 = ERA
:
{{{r/100}}} * 9 = 2.64
multiply by 100, get rid of the fraction, results
r * 9 = 100(2.64)
9r = 264
r = {{{264/9}}}
r = 29{{{1/3}}} innings
:
:
Check this by finding the ERA with 29.33 innnings
{{{29.33/100}}} * 9 = 2.64</PRE>