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The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

240 seventh graders and two-thirds of the students participate in after-school activities how many students participate in after-school activities

Aliter of water contains about 3.35 x 10^25 molecules. a certain river discharges about 2.9x 10^8 l of water every second. about how many molecules does the river discharge every minute? write your answer in scientific notation