An isotope of cesium (cesium-137) has a half-life of 30 years. If 4.0 mg of cesium-137 decays over a period of 120 years, how many mg of cesium-137 would remain?

Do you want free brainliest and free points? answer this drivers ed question correctly and ill give you both : ) how can you count following distance? a. look for a moving object and count the seconds it takes for you to pass it after the car you are following has passed it. b. look for a stationary object and count the seconds it takes for you to pass it after the car you are following has passed it. c. look for the rear wheels of the car in front and count the number of rotations. d. look for the stripes on the road and count them as you pass by.

With my drivers ed and i’ll mark you brainliest + free 10 points adjusting the driver's seat is a. only necessary when you purchase a new vehicle b. usually enough to make up for an arm or leg injury c. not necessary if you're only driving a few miles d. not just for comfort

Meritocracy is the belief that hard work and achievement a: can reduce a persons position in society b: can change a persons position in society for the better c: has little influence on a persons social standing d: can decrease social inequality