PROBLEM 1. Express the results of the following operations and indicate the number of significant digits. A. 45.2 / 6.3578 B. 2.8723 x 1.6 C. 4.7832 + 1.234 + 2.02 D. 1.0236 - 0.97268 PROBLEM 2. Express the following numbers in (a) scientific notation and (b) engineering notation. A. 1500 B. 63200000 C. 0.0234 D. 0.000059 E. 170 PROBLEM 3. Express the following numbers in engineering notation using the appropriate prefixes. A. 1,000,000 0 B. 100,000 V C. 0.0001 A D. 0.00000056 A PROBLEM 4. Calculate the time that is needed for a current of 10 mA to transfer 80 mc PROBLEM 5. Calculate the energy that will be needed to move a charge of 10 C under the voltage difference of 80 V