Ling Chi has a 30-inch-row corn planter. How many centimeters apart are the rows?​

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

The table shows the number of students who signed up for different after school activities. activity students cooking 9 chess 4 photography 8 robotics 11 select the true statements about the information in the table.

Officer brimberry wrote 32 tickets for traffic violations last week, but only 4 tickets this week. what is the percent decrease? give your answer to the nearest tenth of a percent.