Dianne earns $7.90 per hour at her job in Tennessee. If she worked for 40 hours last week, how much is her gross pay (before any deductions)?

Dianne's gross pay(before any deductions) is $7.90/hour * 40 hours = $<<7.9*40=316>>316. Answer: \boxed{316}.

To calculate Dianne's gross pay, we need to multiply her hourly rate by the number of hours she worked.

Hourly rate: $7.90
Number of hours worked: 40

Gross pay = Hourly rate * Number of hours worked
Gross pay = $7.90 * 40

Calculating the gross pay:
Gross pay = $316.00

Therefore, Dianne's gross pay (before any deductions) is $316.00.