If there was an online shopping site was selling about 420 items per second. At this rate, how many items would it sell in 30 minutes

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Yesterday, george drank 1 small bottle and 2 large bottles, for a total of 1,372 grams. the day before , he drank 1 small bottle and 1 large bottle, for the total of 858 grams. how many grams does each bottle hold?

Tim tradesman pays $2,000 annually for $125,000 worth of life insurance. what is the cash value of the policy after 10 years? 11,125 13,125 17,800 111,250