Estimate the answer to 44,596,251 – 28,257,934 by first rounding each number to the nearest million.

44,596,251 rounded to the nearest million is 45,000,000. 28,257,934 rounded to the nearest million is 28,000,000.

45,000,000 - 28,000,000 = 17,000,000

17,000,000 is the answer.

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Answer d; a supplementary angle = 180°, so if that angle = 150°, y would = 30°.