The angle of elevation of the top of a tower from a point on the ground is 50 degrees. he now moved 50 meters away from the tower, the angle of elevation reduced to 40 degrees. find the height of the tower?

What is the upper quartile in the box plot?

3.4a=57.8 what is the the value of a

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z