Estimate the absolute deviation and the coefficient of variation for the results of the following calculations. Round each result so that it contains only significant digits the numbers in parentheses are absolute standard deviations.
(a) y = 3.95(±0.03) + 0.993(±0.001) -7.025(±0.001) = -2.082
(b) y = 29.2(±0.3) x 2.034(±0.02) x 10-17 = 5.93928 x 10-16
(c)

1876)-89(23) 1240(1) + 57(8) = 7.5559 10-2