4) you and a friend go out for lunch. each of you paid $6.50 for the meal including a 6% sales tax.
what was the total cost of the meal before the tax was paid?

Awork system has five stations that have process times of 5, 9, 4, 9, and 8. what is the throughput time of the system?

1. evaluate 8x(2)y9(-2) for x=-1 and y=2 2. simplify the equation. -() 3. simplify the expression. [tex]\frac{5}{x(-2) y9(5)}[/tex]

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”?