At a coin collector shop, a rare us coin was recently marked up 50% and is now selling for $210 how much was the coin before the mark up?

Three cylinders have a volume of 2836 cm^3. cylinder a has a height of 900 cm. cylinder b has a height of 225 cm. cylinder c has a height of 100 cm. find the radius of each cylinder. use 3.14 as an approximate for π

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

Jonathan puts $400 in a bank account. each year the account earns 6% simple interest. how much interest will be earned in 5 years?