number of possible pins = 9 x 10 x 10 x 4 = 3600
Answer:
Because it is site specific, construction work is impossible to outsource.
Even when the economy is poor, demand for building maintenance remains high.
Construction work varies by season, but all workers have come to expect this.
Explanation:
Answer:
A signal has a wavelength of 1 μm in air
Explanation:
looked it up
Answer:
I have used a ruler many times to meausre various things such as paper, my height, etc. I was taught how to use a ruler in elementary school. I am pretty confident in using a ruler because I have used one for a majority of my life.
Explanation: