Sam has $100 in the bank and saves $40 per month. joelle saves $30 per month and currently has $210 in the bank. after how many will they have the same amount of money saved?

Can someone answer this question? : )

Is the number 128.439 a rational number

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!