Figure I and figure II are similar quadrilaterals. Which proportion must be true?
A. a/b = 8/2
B. 3.2/2 = a/8
C. b/6.4 = 8/5
D. 2/3.2 = b/a

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!