Write 7/9 as a decimal. PLEASE EXPLAIN HOW YOU CALCULATE YOUR ANSWER.

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

What is the measure of angle tvu shown in the diagram below

In a column proof the right column states your reasons