Solve each of the problems, expressing each answer to the proper significant figures
(e.g. 5.34 x 0.89 = 4.8 ). Use exponential notation for problems (d) and (e).

(a) 12.62 + 1.5 + 0.25 =
(b) 0.4278 ÷ 59.6 =

(c) (452) (62) =
14.3

(d) (2.25 x 103) (4.80 x 104) =


(e) (1.64 x 10-4) ÷ (1.2 x 102) =