1 a.) 20cm^2 to mm^2

b.) 50cm^3 to mm^3

c.) 3.75ha to cm^2

d.) 6.93litres to cm^3

e.) 6500mm^2 to cm^2

f.) 72km/hr to m/sec

a) 200 mm^2

b) 500 mm^2

c) 3.75e + 8

d) 6390 cm^2

e) 650 cm^2

f) 20 m/s

Step-by-step explanation:

For a) and b) : 1 cm = 10 mm, multiply 20 (and 50) by 10

For c) : the formula is to multiply 1e + 8

For d) : 1 Liter = 1000 Cubic Centimeters (hopefully that's what you're referring to)

For e) : 10 mm = 1 cm, divide by 10

For f) : divide the value by 3.6