The gateway arch in st. louis, missouri, weighs about 20,000 tons. write an amount that could be the exact number of tons the arch weighs.

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

Aflower has 26 chromosomes. to create a new flower, how many would a sperm cell have what is called?

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b