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1234Using formulas

Solutions to the exercises

Exercise 1
a

cm3

b

804.25 cm3

c

V = 16 π r 2

d

Do this, but first make a suitable table!

e

For instance: h = ( 1000 ) ( π r 2 )

Exercise 2
a

Not a formula.

b

This is a formula.

c

This is a formula.

d

Not a formula.

Exercise 3
a

€ 32

b

The graph is a curved line through ( 200 ; 0.20 ) , ( 400 ; 0.20 ) , approximately ( 600 ; 0.17 ) and ( 800 ; 0.16 )

c

800

Exercise 4
a

I R = 200 with I in A and R in Ω

b

Do it, but make a table first.

c

approximately 13.3 V

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