The correct answer is:
TRIGONAL PYRAMIDAL

What is the difference between a quantity and a unit?
Answer:
Physical quantities are a characteristic or property of an object that can be measured or calculated from other measurements. Units are standards for expressing and comparing the measurement of physical quantities. All units can be expressed as combinations of four fundamental units.
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Answer:
9 mL.
Explanation:
Dosage of insulin is 90 mg
The concentration of insulin is 10 mg/mL
We need to find how many milliliters of the solution do you need to give the patient. It can be calculated as follows :

So, 9 mL of the solution is to be given to the patient.