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March 5, 2015

March 5, 2015

Posted by **Lucy** on Saturday, March 29, 2008 at 11:45am.

Solve log4(m-3)+ log4(m+3) =2

Answer: 1

Solve 6^3n=43^5n-4

Answer: 1.1202

Solve 5^2x+1>=50

Answer:x>=4.5000

Use common logarithms to approximate log9(207) to four decimal places.

Answer: 2.4270

Ealuate: In e^-9x

Answer: -9x

Solve 4+3e^5x = 27

Answer: 1.53333

Solve IN (x+5) >= 2.

Answer: x>= 2.3891

A particular compound decays according to the equation y=ae^-0.0974t, where t is in days. Find the half life of this compound.

Answer: about 7.1 days

At a large town with a large convention center, the cost of a hotel room has increased 5.1% annually. If the average hotel room cost $48.00 in 1980 and this growth continues, what will an average hotel room cost in 2012? Use y=a(1+r)^t and round to the nearest cent.

Answer:$235.79

Thanks.

- Algebra II (#1 of 9) -
**drwls**, Saturday, March 29, 2008 at 12:58pmlog4(m-3)+ log4(m+3) =2

log4[(m+3)(m-3)] = log4(m^2-9) = 2 = log4(16)

m^2 -9 = 16

m = 5

<<Use common logarithms to approximate log9(207) to four decimal places.

Answer: 2.4270>>

log9(207)*log10(9)= log10(207)

log9(207) = 2.31597/0.95424 = 2.4270

I don't have time to do all 10. Fewer questions per post would be appreciated, even it you just want them checked.

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