Aland developer is dividing 20 acres of land into 2/5 of an acre lots in each light is sold for $15,000 what is the total value of the 20 acres

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!