Answer:
$394 U
Explanation:
Calculation for the activity variance for vehicle operating cost in February would be
First step is to calculate the Flexible budget
Flexible budget= $1,880 + ($394 × 14)
Flexible budget=$7,396
Second step is to calculate the Planning budget
Planning budget= $1,880 + ($394 × 13)
Planning budget=$7,002
Last step is to calculate the activity variance for vehicle operating cost in Februar
Activity variance=Flexible budget $7,396-Planning budget $7,002
Activity variance=$394 U
Therefore The activity variance for vehicle operating cost in February would be closest to $394 U.
Answer:

Explanation:
We want to know the value of
when 

From here, we can find the factors of the quadratic equation, we need two numbers that multiplied give -400 and added -30. Since they are factors of 400, we can choose -20x20 or -40x10. When adding -20 and 20 the result is zero, but the sum of -40 and 10 is -30. Then:

The solutions of the quadratic equation are
and
:

Since
is a positive integer:

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