Please help! I don't understand how to do this :( Simplify.

Remove all perfect squares from inside the square root. Assume y is positive.

√200y^4=

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

Indicate the formula for the following conditions: p^c(n,r)=