exam Maths Puzzle Numerical Ability

joelle walks to the store @ 4.5 mph.She walks back at 3 mph. total walking time is one hour.how long did it take her to walk to the store?

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exam Other Question

sqrt4(sqrt32+3sqrt8) Heparin 7500 units has been ordered sc(subcutaneous); dosage available is 1000 units/mL. How many milliliters will you give? Please show your work. Thanks. Lean