B or d are most likely it I could be wrong if I am, I am so sorry:)
Answer:
113.1
Step-by-step explanation:
Volume of sphere =
× π × r²
Volume of sphere =
× π × 3²
Volume of sphere =
× π × 9
Volume of sphere =
× 9 π
Volume of sphere = 113.1
you would have to do 170/20 which equals 8.5 multiply that by 8
so his daily does would be 510 milligrams