What is the reciprocal of each number?
column a column b
1. 2/9
2. -9/2
3. 9/2
4. -2/9

a. -9/2
b. -2/9
c. 2/9
d. 9/2
e. 1

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!