What is 6.54 rounded to the 10s place? ?

I'm terrible at math any here is appreciated.

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

Asunflower was 20 1/2 inches tall. over the next 6 months, it grew to a height of 37 inches tall. what was the average yearly growth rate of the height of the sunflower? ? plz write a proportion to solve i will give you 100 points