Suppose a radioactive substance decays at a rate of 4% per hour. How long does it take until the substance is half of its original weight?

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"

Erik buys 2.5 pounds of cashews. if each pound of cashews costs $7.70, how much will he pay for the cashews?