Solve 3^x = 29
A 4.150
B 3.065
C 2.5
D 3.75
E 2.075
F 1.25
2007-06-22 04:01:35 · 6 answers · asked by Nathan C 1 in Science & Mathematics ➔ Mathematics
my working :
3^x = 29
x lg 3 = lg 29
x = lg29 / lg 3
x= 3.065
u r just too lazy to solve ur maths problem~
2007-06-22 04:17:41 · answer #1 · answered by wabawuby 2 · 0⤊ 0⤋
They have the exact answer above - especially #2 -but think about it intuitively -the question is asking 3 raised to what power would give you 29. That means three multiplied by itself how many times would equal 29. If you think about it then the answer is obvious from the multiple choice answers given.
2007-06-22 11:11:32 · answer #2 · answered by the_hilton 4 · 0⤊ 0⤋
Nate, are you learning any of this logs stuff?? C'mon!
1) Log both sides.
2) Move the exponent in front. x log 3 = log 29
3) Divide by log 3.
x = log 29/log 3
2007-06-22 11:05:03 · answer #3 · answered by Mithridates 2 · 1⤊ 0⤋
Since this is a multiple choice question, you can just plug in all the answers to see if they work.
This works very effectively when you don't have any idea what to do, especially on tests like the SAT and ACT
2007-06-22 11:10:35 · answer #4 · answered by garpit c 5 · 0⤊ 0⤋
Using logs, take the log of both sides: log3^x = 29
x log 3 = 29
x = 29 / log3
then use your calclator
2007-06-22 11:05:27 · answer #5 · answered by gfulton57 4 · 0⤊ 0⤋
Take the log of both sides, then solve for x. You'll need a calculator or a log table.
2007-06-22 11:04:29 · answer #6 · answered by Mathsorcerer 7 · 0⤊ 0⤋