Kunci Jawaban MTK Kelas 9 Halaman 58 59: Uji Kompetensi 1 Pangkat Nol, Pangkat Negatif, Bentuk Akar

c. (8,32 × 10⁴) : (4 × 10⁻⁶)

= (8,32 : 4) × 10⁴⁻⁽⁻⁶⁾
= 2,08 × 10¹⁰

d. 3,7 × 10³ × 5,2 × 10⁻³

= 3,7 × 5,2 × 10³⁺⁽⁻³⁾
= 19,24 × 10⁰
= 1,924 × 10

Nomor 7

a. x × y

= 24 × 54
= (2³ × 3) × (2 × 3³)
= 2³⁺¹ × 3³⁺¹
= 2⁴ × 3⁴
= (2 × 3)⁴
= 6⁴

b. x / y

= 24/54
= (2³ x 3) / (2 x 3³)
= 2³⁻¹ × 3¹⁻³
= 2² × 3⁻²
= 2² × 1/3²
= 2² / 3²
= (2/3)²

Nomor 8

492⁵ – 246⁵
= (246 × 2)⁵ – (246 × 1)⁵
= (2⁵ – 1⁵) × 246⁵
= (32 – 1) × 246⁵
= 31 × 246⁵

Nomor 9

1 tahun = 365 hari × 24 jam × 3600 detik = 31.536.000 detik