Question 1083149
what is r if 9Pr= 3024
<pre>{{{""[n]P[r]}}} = n(n - 1)(n - 2).....[n - (r - 1)]
{{{matrix(1,3, ""[9]P[r], "=", "3,024")}}}
The CONSECUTIVE DECREASING factors of 3,024 are: 9, 8, 7, and 6.
There are 4 (FOUR) decreasing factors, and so: {{{matrix(1,5, ""[9]P[r], "=", ""[9]P[4], "=", "3,024")}}}. 
Thus, {{{highlight_green(matrix(1,3, r, "=", 4))}}}