Ln(5^x) = ln(81.2)
xln(5) = ln(81.2)
x= ln(81.2)/ln(5)
x= ln(406/5)/ln(5)
x = ln(406) - ln(5)/ln(5)
log (ab) = log(A) + log (B)
ln(2) +ln7 + ln(29 - ln(5)/ln(5)
x = 2.7320 (4dp)

3 0

3 years ago

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Karen makes $5 per hour for babysitting and $12 per hour giving music lessons. One week she worked a total of 18 hours and made

swat32

B = hours babysitting
m = hours giving music lessons

so... whatever "b" and "m" are, their sum for that week was 18
thus
b + m = 18

now, money wise, she makes $5 for "b" and that is, she made 5*b or 5b that week
for "m", she makes $12, so for that week she made 12*m or 12m

whatever "b" and "m" are
thus

5b + 12m = 139

now $\bf \begin{cases}
b+m=18\to \boxed{m}=18-b\\\\
5b+12m=139\\
----------\\
5b+12\left( \boxed{18-b}\right)=139
\end{cases}$

solve for "b", to see how many hours she spent babysitting

4 0

3 years ago

the height of a cone-shaped statue is 9ft, and the diameter is 12 ft. what is the approximate volume of the statue? Use 3.14 to

Lady bird [3.3K]

Answer:

1017.36

Step-by-step explanation:

9times 36=324

324 times pi =1017.36

8 0

4 years ago

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Anne earned $3 an hour baby-sitting, and $4 an hour working in the garden. Last week she did baby-sitting for 5 hours and garden

Dmitry_Shevchenko [17]

She needs 8 more dollars.
if you multiply 3 times 5 equals 15
and 4 times 3 equals 12
then add that which is 27
35 minus 27 is 8.

8 0

3 years ago