the half-life of a particular radioactive substance is 3.3 hours. this means that 10 lb of the substance will decay 5 lb in 3.3 hours. find an exponential function to model this data

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

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