Answer:
Left amount of Polonium-210 after 115 days will be 4.5927 microgram
Explanation:
We have given initial mass of Polonium-210 
Decay rate x= 0.502% = 0.00502
Time t = 115 days
We have to find the left amount of Polonium -210 after 115 days
We know that left amount is given by

So left amount of Polonium-210 after 115 days will be 4.5927 microgram
Answer:
Color Blindness Fragile X Syndrome: Disorder that is the most common cause of inherited mental impairment....
Duchenne Muscular Dystrophy: Disorder caused by the lack of dystrophin...
Hemophilia Disorder: caused by the absence or minimal presence of factor Vill or factor IX...
Colour blindness (Daltonism): Disorder that affects the ability to, in most cases distinguish reds from greens
Explanation:
Fragile X syndrome is an inherited disease associated with different health problems during development including cognitive disabilities.
Duchenne is an inherited disorder caused by a mutation in the dystrophin gene that encodes a protein required for normal muscle functioning.
Hemophilia is an inherited disorder caused by mutations in the genes that encode for coagulation factors, which are required for normal blood coagulation.
Colour blindness is an inherited condition associated with the ability to distinguish red color from green color. This condition is caused by mutations in the genes that encode for red and green light-sensitive proteins.
I would say D because mechanical weathering is the breaking up of rocks by physical forces