This is geometry so you know

B. 8

Step-by-step explanation:

if angle A is 90 and B is 45 then C must be 45 (all three angles must add to 360)

this is an isosceles right triangle and the ratio of legs to hypotenuse is 1 :

so if each leg is 8 then the hypotenuse is that value multiplied by

D = ⅓

Step-by-step explanation:

Given the following data;

A = ⅙

B = ⅖

C = ⅒

To find what fraction of the chemical is D;

The sum of all the fractions of the chemical compound must be equal to one (1).

A + B + C + D = 1

Substituting the values, we would have;

⅙ + ⅖ + ⅒ + D = 1

Lowest common multiple (LCM) = 30

⅔ + D = 1

D = 1 - ⅔

Lowest common multiple (LCM) = 3

D = ⅓