A. Write down the following numbers using the power-of-ten notation. 1. 23, 500, 000, 000, 000 = 4. 0.000000039? = 2. 0.00000000215 = 5. 0.0000001305 = 3. T, 650, 000, 000, 000= B. How many signicant figures are there in each of the following numbers? 1. 16?.2 = 4. 0.0090501 = 2. 40.00 = 5. 2, 005 = _ 3. 0.00253 = C. Round off the following numbers to 3 significant figures. 1. 0.000256}? = 2. 15,239,000 = 3. 163,563 4. 0.005029 5. 1,345 0. Convert the following given temperature to what is being ask. 1. 1060F 2. 509 K 3. 250.300 4. 39.?\"F 5. 190.30F DC or In: In: at