If you place a 45 foot ladder against the top of a 36 foot building how many feet will the bottom of the ladder be from the bottom of the building

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ab=9, and ac=12, find hc.

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais