Answer:
It is not valid
Explanation:
I'll assume the question relates to cell referencing in Microsoft Excel.
To reference a cell in Excel, we make use of the following steps:
- Write out the cell column name first
- Followed by the row number
7b implies that, the row number first, followed by the column name; this doesn't follow the naming convention of cells.
Hence, 7b is invalid.
Explanation:
1. radio transmission.
2. microwave transmission
3. infrared transmission.
They act like a filter for info a person receives
The Exhaust stroke.
The exhaust stroke is the final stroke of the four-stroke cycle engine. It occurs when the stroke valve is open and the intake valve is closed as can be seen in the picture above. The piston in this stage moves upwards from BDC to TDC. The exhaust valve opens other moving parts like the wheel which pushes the piston back to TDC. This action emits the spent air-fuel mixture through the exhaust valve.
Answer:
false
Explanation:
plants do that, they absorb carbon dioxide and then they create oxygen, then humans breathe the oxygen and makes CB
