A building cast a 235 ft shadow along the ground. the angle of the sun’s ray with the ground is 24 degrees. How tall is the building?

## Two rectangles have an area of 81 square inches. Name two possible perimeters for the rectangles

Two rectangles have an area of 81 square inches. Name two possible perimeters for the rectangles

## Radioactive radium has a half-life of approximately 1599 years. What percent of a given amount remains after 100 years?

Radioactive radium has a half-life of approximately 1599 years. What percent of a given amount remains after 100 years?