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if 2/3 of a number is-21 find the numberFind the compound amount and compound interest if 2500 is invested for seven years and interest is compounded continuously at the annual rate 7 3/4 %the sum of 13 and twice a number is-19.the result number is 16Heather is considering purchasing an item that costs 19. The sales tax in Heather's 지역 is set at 6.8%. What is the total purchase price that Heather would be charged on this purchase?The 용량 of a cube is 1.5 m3. Find the length of its edge to the nearest tenth of a meter.edge length = m