Answer:

Step-by-step explanation:
Red blood cell: 
Grain of sand: 
The "how many times larger" part can be figured out by forming a ratio between the two diameters above:

Note that dividing the powers of ten corresponds to subtracting the denominator power from the numerator power of 10.
I can’t see that well can you show it more clearly
180 is the sum of the angles, so x+3x+2x = 180
so, 6x=180
and you divide 180 by 6 which is 30
therefore x is 30
the question is asking you for angle C though which is 2x
so u do 2 times 30, which is 60 degrees