ILL GIVE BRANLIEST *EXTRA POINTS* dont skip :((

52%

Step-by-step explanation:

Assuming that the shaded area is blue and knowing that the figure is 10x10, that means there are 100 squares. We know that percent is out of 100 (hence the name) so this is easy division. So since 52 of the 100 squares are shaded in, that can be represented as a fraction, which is 52/100. Then we change that into a percent so we have to get the denominator to 100, which is already is so it would be 52%

d. bc = 12 and ef = 16

step-by-step explanation:

we are given that δabc : δdef such that .

also, it is given that

so, from the options, we need that .

a.

b.

c.  

d.

as, we can see that only option d gives the same ratio as i.e. .

hence, the possible lengths are bc = 12 and ef = 16.

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons