0.25% of 42 is what number

What is the value of the expression below? (81^2)^1/8

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4

Tobias gold sells computers at the office center he's guaranteed a minimum salary of $1,959 per month plus 6.3% commission on total sales how much in total sales is he