The half-life of Cs-137 is 30.2 years. If the initial mass of the sample is 1.00kg, how much will remain after 151 years?

5/6+7/8what is the answer sealsdbdbshd

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.