Question

Multiply or divide as indicated. (Express your answer in scientific notation with proper number of significant figures.)

(a) (6.5 1018 m)(5.1 10-10 m)
m2
(b) (5.1 10-7 m)/(2.5 10-12 s)
m/s
(c) (8.0 10-4 km)(1.5 10-3 km)
km2
(d) (7.0 105 kg)/(3.5 103 m3)
kg/m3

Answer 1

Step-by-step explanation:

since each factor has only two significant figures, your answer has to have only two s.f.

a) 33×10⁸ m²

b)13×10⁵ m/s

c)12×10^-7 km² (12 × 10 to the minus 7)

d)25×10² kg/m³

(I'm assuming that 6.5 1018 in exercise a is 6.5×10¹⁸, 7.0 105 in exercise d is 7.0×10⁵ , and so on)