Me i need answers for my sisters homework

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

How do you write 600 as a product of its prime factors (index! )

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.