B. ) Unless you're missing some data.
Answer:
The ratio of boys to girls is 4:5. So let 4x be the number of boys and 5x be the number of girls. Then 4x+5x = 9x is the total number of students. Then the fraction of boys in the class is 4x/9x = 4/9.
Answer:
$112
Step-by-step explanation:
7% for each year = $28
7% for four years = $28.4= $112
