Which description can be written as the expression 8/21n?
a the quotient of twenty-one times a number and eight
b the product of eight and twenty-one times a number
c the quotient of eight and twenty-one times a number
d the product of twenty-one times a number and eight

Nell has a sales clerk job that pays $12 per hour for regular gas work hours. she gets double time for any hours over 40 that she works in a week. how many hours did nell work if her weekly pay was $744

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Anyone know? is appreciated! will mark brainliest if correct!