The quantity a varies inversely with b and directly with o. Which equation models this relationship?
A. c=kb/a
B. a=kc/b
C. a=kb/c
D. b=ka/c

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”?

How many 3/8s are in 6 plz someone tell me now

Can someone me find the original price? the discount is 5% and the sale price is $68.40