Perform the mathematical operations indicated and express the answers in the appropriate number of significant digits:

a. 3,68 + 7,3654 + 0,5 = b. 14,745 1,60 = c. 0,022 x 0,467 = 320 x 24,9 d. 0,080 432,7 x 6,5 x 0,002300 e. 62 x 0,103 (1,45 x 102) x (8,76 x 10-4) (9,2 x 10-3)2 -7,29 x 102 + (1,45 x 10-4)2 + 4 (1,00) (2,7 x 10-5) g. 2 x (1,00) f. =