Avet measured the mass of two birds. the mass of the robin was 76.64 grams. the mass of the blue jay was 81.54 grams. estimate the difference in the masses of the birds.

1jessica's home town is a mid-sized city experiencing a decline in population. the following graph models the estimated population if the decline continues at the same rate. select the most appropriate unit for the measure of time that the graph represents. a. years b. hours c. days d. weeks