Which expression is equivalent to a+4a+8a+4a+8

Essay questions may also be referred to as a. talk questions c. hard questions b. explain questions d. think questions

Based on calculations, students should have 10.4 grams of powder after conducting an experiment. the students get these results: 10.2 grams, 10.4 grams, 10.3 grams, 10.4 grams, and 10.5 grams. which words best describe this data? check all that apply. a- accurate b- falsified c-invalid d-precise e-redundant

What is 7/81 as a percentage? round your answer to the nearest tenth of a percent.