Answer:
10 million (10,000,000) tens can go into 100,000,000
Do you have a picture of the whole question?

3*boys=2*18
3*boys=36
boys=12
12+18=30
total number of students: 30
Product means multiplication.
Given w= weight of a trout.
So, we need to convert "product of 16 and weight of trout: w " into an algebraic expression.
So, product of 16 and w can be written as 16*w or simply 16w.
Hence, B is the correct choice.