Help me with this question:/ plz

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.

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b

The relative growth rate for a certain type of fungi is 60% per hour.a small culture has formed and in just 6 hours the count shows to be 20,273 fungi in the culture.what is the initial number of fungi in the culture?