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## Homework Statement

1. Perform the following operations and write your answers with appropriate

number of significant figures: (a) 589.01−89.020 (b) 1.0×9.00 (c) 180 /pi

(d) 180.0 /pi (e)3.901x10

^{-5}+ 1.0x10

^{-7}

2. Perform the following unit conversions and express the answer in scientific

notation: (a) 0.510 kg to g (b) 92 mi to km (c) 3 0.50 m to 3 cm (d) 15 μs to ms

(e) 60.0 km/h to m/s

## The Attempt at a Solution

a) 589.01-89.020 = 499.99

b) 1.0 x 9.00 = 9.0

c) 180/ Π = 57

d) 180.0/Π = 57.30

e) 3.901 x 10^-5 + 1.0 x 10^-7 = 0.00004

2. a) 0.510kg x 1000g/1kg= 5.1 x 10

^{2}g

b) 92 mi x 1.609344km/1mi= 1.48059 x 10

^{2}km

c) 0.50m

^{3}x 1 000 000cm

^{3}/ 1m

^{3}= 5 x 10

^{5}cm

^{3}

d) 15μs x 1ms/0.001 μs = 1.5 x 10

^{-2}ms

e) 60.0km/1hour = 65000m/3600 sec = 1.805556 x 10

^{1}m/s