3; 15; 75,375 --
The fifth term of the sequence

The fifth term of the sequence is 1875

Step-by-step explanation:

This is a geometric sequence since each consecutive term is being multiplied by 5. Therefore, the 5th term would be 5 times the 4th term, or 375*5=1875

b) 1/3 * 1/5

step-by-step explanation:

each smallest part is 1/15 since the written one is 1/5 and it's divided by 3 equal parts. (1/5 )/3 = 1/15 = 1/3 * 1/5