Question

Помогите... 15 баллов... ваааааай

Answer 1

$(frac{4}{20a} + frac{5}{20a})* frac{a^{2} }{9} = frac{9}{20a} * frac{a^{2} }{9} = frac{ a^{2} }{20a} = frac{a}{20}$

Answer 2

0.39

Answer 3

=((4a+5a)/20a)*((a^2)/9)=(9a^3)/180a=(a^2)/20=60.84/20=3.042