i need help with questions 4-9

need help on 4-9

4. A bullet can travel as fast 2,600N s, what is this speed in mileshrn 1 vile =5280ft 5. What is the density in gjmL of a metal object with a mass of 0.25kg and a volume of 135.0 mL 6. The licensed prescriber onders phenobarbital 45 mg ocally two tirnes a day. Phenobarbital clixir, 20mg/5mL, is available. How many mL will the nurse administer? 7. Convert 253 mg into grams. 8. Convert 125L into mL. 9. The licenised preseriber orders Prozac (fluoxetine) 40m. po daily in A.M. How many mL will the nurse administer per does? HOMEWOKK CHAPIHR O2 MLASUHEMENIS Directions: Use the significant figure rules and scientific notation where appropriate. All work must be shown on a separate piece of paper. 1. How many significant figures does this value have? 0.0025020=7 signisican 4 eig ures 2. 1.34+0.2=1.54 3. (9.331015)(0.35103)3.36 4. A bullet can travel as fist 2,600f/s, what is this speed in miles/hr? 1 mile =5280ft 5. What is the density in g/mL of a metal object with a mass of 0.25kg and a volume of 135.0 mL 6. The licensed preseriber orders phenobarbital 45mg orally two times a day. Phenobarbital elixir. 20mg/5mL, is available. How many mL will the nurse administer? 7. Convert 253mg into grams. 8. Convert 1.25L into mL. 9. The licensed prescriber orders Prozac (fluoxetine) 40mg po daily in A.M. How many mL will the nurse administer per does