Solve the following equation for the given variable.

`I = Prt` for `t`, when:

`I = $3157.21` and `P = $1,961`, and `r = 7%`.

Write your answer as an equation, such as `t = 5`

years.
 

`I = Prt` in general for `t`

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Box 1: Enter your answer as an equation. Example: y=3x^2+1, 2+x+y=3
Be sure your variables match those in the question

Box 2: Enter your answer as an equation. Example: y=3x^2+1, 2+x+y=3
Be sure your variables match those in the question