Help please

3. While in Canada, you rent a car and discover that the speed limit on the highway is 90 km/hr. What is the equivalent value in milhr? (Round to nearest whole number.) 4. Oh no! You wake up with a fever! All you can find at the store is Aspirin, and the bottle says to take 500 mg. The bottle also says each tablet has 125 mg in each tablet. How many tablets should you take? 5. a. When you don't seem to get any better, you eventually end up in the hospital. The doctor orders 150 mg of medicine. The nurse comes in with 6 tablets and tells you that there are 30 mg in each tablet. Is this the correct dosage? b. It not, how many tablets should you get