Find the numerical value of the log expression. \log a=15\hspace{15px} \log b=-5\hspace{15px} \log c=15
loga=15logb=−5logc=15
\log \frac{b^8}{\sqrt[3]{a^8c^8}}
log
3

a
8
c
8



b
8

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Will give a: 122 b: 90 c: 48 d: 180

Solve 2x − 1 = 11 for x using the change of base formula log base b of y equals log y over log b.