Posted by **Lucy** on Saturday, March 29, 2008 at 6:41pm.

Solve, round to 4 decimal places if necessary:

3.9^m-4=10.21

Answer:

(m-4)In(3.9)=In(10.21)

m(In3.9)-4(In3.9)=In(10.21)

m=(In10.21)+4(In3.9)/In3.9

m=7.7672/1.3609

m=5.7074

e^3x>=21

Answer:

Ine^3x>=21

3x=In21

x=In21/3

x=1.0148

Thanks

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