Need help a lot stuck

Find the simple interest earned to the nearest cent for each principal,interest rate,and time 735 7% and two and a half years

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?