What is the approximate cube root of 421.875?

How many $20 bills do you need to have to make $280

For what values of x is x2 + 2x = 24 true?

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.