Respuesta :

jessicasyasya

Step-by-step explanation:

big circle – small circle

big

[tex]\pi \times 3.5 {}^{2} = \frac{49}{4} \pi[/tex]

small

[tex]\pi \times 1.2 {}^{2} = \frac{36}{25} \pi[/tex]

answer

[tex] \frac{49}{4} \pi - \frac{36}{25} \pi = \frac{1081}{100} \pi[/tex]