SAT Math help- practice PSAT from collegeboard

BigWeight
Sat, 02 Aug 2008 16:23:49 +0000

19 D.

since the rule is 2_ _
there can only be 6 possible entries for the tens digit and only 5 for the ones (since no integer is repeated)…5x6=30


E…right now i cant draw a diagram, but its self explanatory


plug in random numbers and find the circumference…then add 3 to the radius and boom! there u have it