You would have 66 donuts. 
If each you have 9900g of donuts and each donut has a mass of 150g, we can divide 9900 by 150 to figure out how many donuts we have. To do this, we first have to figure out how many times 150 goes into 990. It goes into 6 times and has a remainder of 90. Now we have to figure out how many times 150 goes into 900. It goes in 6 times, meaning that our answer is 66 donuts. 
 
        
             
        
        
        
The 2 hormones are insulin & glucagon.
A hormone will only act on a part of the body it 'fits'. A hormone can be thought of as a key, and its target site ( i.e an organ) has specially shaped locks on the cell walls. 
If the hormone fits, then it will work.
The hormone can set off a cascade of other singling pathways in the cell to cause an immediate effect ( for instance, insulin signaling leads to a rapid uptake of glucose in muscle cells)
The endocrine system is a tightly regulated system that keeps the hormones and their effects at just the right level. One way this is achieved is through ' feedback loops'. The release of hormones is regulated by other hormones, proteins or neuronal signals.
The released hormone then has its effect on other organs. This effect on the organ feeds back to the original signal to control any further hormone release.
btw- found all this info @ the Better Health channel, an australian government health website , so if your still confused by my answer, check out this website
www.betterhealth.vic.gov.au/health/conditionsandtreatments/hormonal-endocrine-system
        
                    
             
        
        
        
Answer:
0.1M NH3 
Explanation:
The boiling point of aqueous solutions depend on the nature of intermolecular interactions present. KBr will yield an ionic solution but NH3 will yield a molecular solution having hydrogen bonds. The degree of hydrogen bonding in the aqueous solution will further increase with the concentration of the solution.
Remember that experimental data shows that hydrogen bonds are strong bonds that lead to a significant increase in the boiling point of solutions. Hence 0.1M NH3 solution will have a higher boiling point due to intermolecular hydrogen bonding in the solution.
 
        
             
        
        
        
34% I believe
Hope this helps!
STSN