Respuesta :

Answer:

19. b = 8ft

20. r = 28cm

Step-by-step explanation:

19. [tex]64ft^2=1/2b*16ft[/tex]

[tex]1/2b=4ft[/tex]

[tex]b=8ft[/tex]

20. 88cm = 22/7r

Divide by 22/7 on both sides to get rid of 22/7

88/1 ÷22/7 = 88/1 * 7/22 = 4 * 7 = 28

28cm = r

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