Answer:Step-by-step explanation:B. Conversions and Calculations90 cm + 60 cm = 150 cmConvert to meters: ( 150 , \text{cm} \times \frac{1 , \text{m}}{100 , \text{cm}} = 1.5 , \text{m} )Convert to kilometers: ( 1.5 , \text{m} \times \frac{1 , \text{km}}{1000 , \text{m}} = 0.0015 , \text{km} )1,500 mConvert to kilometers: ( 1,500 , \text{m} \times \frac{1 , \text{km}}{1000 , \text{m}} = 1.5 , \text{km} )16 cmConvert to kilometers: ( 16 , \text{cm} \times \frac{1 , \text{km}}{100,000 , \text{cm}} = 0.00016 , \text{km} )500 mConvert to kilometers: ( 500 , \text{m} \times \frac{1 , \text{km}}{1000 , \text{m}} = 0.5 , \text{km} )Summary150 cm is equal to 1.5 meters or 0.0015 kilometers.1,500 meters is equal to 1.5 kilometers.16 cm is equal to 0.00016 kilometers.500 meters is equal to 0.5 kilometers.