Choose the correct simplification of (5x2y3z4)(6x3y4z2).

30x5y7z6
30x6y12z8
11x5y7z6
11x6y12z8

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”?

Tom drove 206 miles in 3.9 hours. estimate his average speed.

In 1995 america online had about 3000000 users over the next decade users are expected to increase from a few million to the tens of millions suppose the number of users increased by 150% by the year 2000 how many users will there be in the year 2000