When did the United States first establish its measuring system, and who was responsible for picking the system?

Which of the functions graphed below has a removable discontinuity?

What is the angle measure, or angle of depression, between this bird and the bird watcher?

Sally deposited money into a savings account paying 4% simple interest per year. the first year, she earned $75 in interest. how much interest will she earn during the following year? show your work and explain your reasoning in the space provided below.