Posted by jeana on Wednesday, July 13, 2011 at 8:19pm.
Write each of the following in the indicated base.
(a) 1021three to base ten.
(b) 534 to base twelve
(c) MCMLXII to base ten

Math  Reiny, Wednesday, July 13, 2011 at 9:47pm
a) 1021_{3} = 1(3^3) + 0(3^2) +2(3) + 1
= 27+6+1
= 34
b) powers of 12 are 12, 144 , 1728 ,....
so 534 = 3(144) + 8(12) + 6
= 386_{12}
c) MCMLXII = 1000 + 900 + 50 + 12 = 1962