Sean is conducting an experiment with an isotope of a particular element that has a half-life of 4 hours. he begins with a sample of the isotope with a mass of 85 grams. he then measures the mass of the object every hour. what is the approximate mass of the sample after 24 hours?

What is the equation of the linear function represented by the table?

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

If a is a nonzero real number then the reciprocal of a is