D. All of these
Reason being, they wouldn't have been made if something hasn't been discovered about them.
This is in the wrong caterigore and yes the answer is 8.0 × 103 N
Between 30-50 or at least in the state i live in
The answer is : Click the Insert Formula icon on the Formulas tab ribbon. The formula bar is located just below the Ribbon. It displays the contents of the active cell. It can also be
used for entering or editing data and formulas. Found on the left of the formula bar, the insert icon dialog box helps the user identify and implement
functions, a type of formula that performs specialized and group calculations.
