Posted by **Tabby** on Saturday, April 21, 2012 at 3:10pm.

solve 9^(2x-3) > 4. Round your answer to the nearest hundredth.

The part in parenthesis is up at top like an exponent. I dont' know how to do this. Please help me.

- Exponential Functions?! -
**Reiny**, Saturday, April 21, 2012 at 5:07pm
find the value of x such that

9^(2x-3) = 4

ln both sides

(2x-3) ln9 = ln4

2x-3 = ln4/log9

2x = 3 + ln4/ln9

x = (3 + ln4/ln9)/2 = appr 1.82

so x > 1.82

check:

let x = 1.81

LS = 9^(.62) = 3.905..... < 4

let x = 1.83

LS = 9^(.66) = 4.26.. > 4

- Exponential Functions?! -
**Some1 Help Me Plz**, Saturday, April 21, 2012 at 5:31pm
Ah, thank you so much!!! GOd bless you!

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