If the population quadruples every period say hour, that means the "rate of growth" is 300%, so whatever the current amount, increased by 3 times as much is 4 times the current amount, or a quadrupled amount.
<span>10 is 40% percent of what </span><span>400 </span>maybe
The pounds is 1.875 I'm not sure about oz
10 1/2 bags of seed. 3×3 1/2