23. Sebuah lukisan mempunyai ukuran panjang (75 + 4√2) cm dan lebar (45 - 7√2) cm Tentukan luas lukisan tersebut ! Jawab:
Answer (3)
There are two properties of enzymes that allow them to act as biological catalysts, and those are temperature and pH levels. Certain temperature is necessary for enzymes to work the way they were intented to, and an appropriate ph level has to be maintained in order for enzymes to function properly.
Enzymes act as biological catalysts due to their specificity for particular substrates and their ability to lower the activation energy of reactions. This accelerates reaction rates significantly, making biochemical processes efficient. Together, these properties are essential for the functioning of living organisms.
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Penjelasan dengan langkah-langkah: Diketahui: - Panjang (p) = (75 + 4√2) cm- Lebar (l) = (45 - 7√2) cm Ditanya: - Luas (L) = ? Solusi: Luas lukisan dihitung dengan rumus: L = p × l L = (75 + 4√2) × (45 - 7√2) L = 75(45) + 75(-7√2) + 4√2(45) + 4√2(-7√2) L = 3375 - 525√2 + 180√2 - 28(2) L = 3375 - 345√2 - 56 L = 3319 - 345√2 Jadi, luas lukisan tersebut adalah (3319 - 345√2) cm². Jika ingin mendapatkan nilai desimalnya, kita bisa menghitung: √2 ≈ 1.414 345√2 ≈ 345 × 1.414 ≈ 487.83 L ≈ 3319 - 487.83 ≈ 2831.17 cm² Jadi, luas lukisan tersebut sekitar 2831.17 cm².
