Question

me ajudem a 7 e na 8:/

Answer 1

Explicação passo-a-passo:

$7)a) {l}^{2} = 121 \\ l = \sqrt{121} \\ l = 11 \: cm \\ \\ p = 4l \\ p = 4 \times 11 \\ p = 44 \: cm \\ \\ b) {l}^{2} = 256 \\ l = \sqrt{256} \\ l = 16 \: cm \\ \\ p = 4l \\ p = 4 \times 16 \\ p = 64 \: cm \\ \\ c) {l}^{2} = 70.56 \\ l = \sqrt{70.56} \\ l = 8.4 \: cm \\ \\ p = 4l \\ p = 4 \times 8.4 \\ p = 33.6 \: cm$

$8)a) {a}^{3} = 1331 \\ a = \sqrt[3]{1331} \\ a = 11 \: cm \\ \\ b) {a}^{3} = 343 \\ a = \sqrt[3]{343 } \\ a = 7 \: cm \\ \\ c) {a}^{3} = 125 \\ a = \sqrt[3]{125} \\ a = 5 \: cm$