Please and Thank You ​

The multiplication property of zero states that the product of any number and 0 is 0. what must be true about either a or b to make ab=0

What is the ratio of the length of an object in yards to the length of the same object in miles?

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!