91Ó°ÊÓ

Correct any answers that have the incorrect number of significant figures. (a) \((78.56-9.44) \times 45.6=3152\) (b) \(\left(8.9 \times 10^{5} \div 2.348 \times 10^{2}\right)+121=3.9 \times 10^{3}\) (c) \((45.8 \div 3.2)-12.3=2\) (d) \(\left(4.5 \times 10^{3}-1.53 \times 10^{3}\right) \div 34.5=86\)

Perform each conversion. (a) \(3.55 \mathrm{~kg}\) to grams (b) \(8944 \mathrm{~mm}\) to meters (c) \(4598 \mathrm{mg}\) to kilograms (d) \(0.0187 \mathrm{~L}\) to milliliters

Perform each conversion. (a) \(22.5 \mathrm{in}\). to centimeters (b) \(126 \mathrm{ft}\) to meters (c) \(825 \mathrm{yd}\) to kilometers (d) \(2.4\) in. to millimeters

Convert \(2.255 \times 10^{10} \mathrm{~g}\) to each unit. (a) \(\mathrm{kg}\) (b) \(\mathrm{Mg}\) (c) \(\mathrm{mg}\) (d) metric tons (1 metric ton \(=1000 \mathrm{~kg}\) )

Convert \(1.88 \times 10^{-6} \mathrm{~g}\) to each unit. (a) \(\mathrm{mg}\) (b) \(\mathrm{cg}\) (c) \(\mathrm{ng}\) (d) \(\mu g\)

A house has an area of \(215 \mathrm{~m}^{2}\). What is its area in each unit? (a) \(\mathrm{km}^{2}\) (b) \(\mathrm{dm}^{2}\) (c) \(\mathrm{cm}^{2}\)

A classroom has a volume of \(285 \mathrm{~m}^{3}\). What is its volume in each unit? (a) \(\mathrm{km}^{3}\) (b) \(\mathrm{dm}^{3}\) (c) \(\mathrm{cm}^{3}\)

The average U.S. farm occupies 435 acres. How many square miles is this? \(\left(1\right.\) acre \(\left.=43,560 \mathrm{ft}^{2} ; 1 \mathrm{mi}=5280 \mathrm{ft}\right)\)

The speed limit on many U.S. highways is \(65 \mathrm{mi} / \mathrm{hr}\). Convert this speed into each alternative unit. (a) \(\mathrm{km} /\) day (b) \(\mathrm{ft} / \mathrm{s}\) (c) \(\mathrm{m} / \mathrm{s}\) (d) \(\mathrm{yd} / \mathrm{min}\)

A form of children's Tylenol is sold as a suspension (in which the drug is suspended in water) that contains \(32 \mathrm{mg} /\) \(\mathrm{mL}\). Convert this concentration into each alternative unit. (a) \(g / L\) (b) \(g / d L\) (c) \(\mathrm{kg} / \mathrm{hL}\) (d) \(\mu g / \mu \mathrm{L}\)