Question

please answer this it's really urgent​

Answer 1

Answer:

a) 5×10²×4×10⁸ = 20 × 10¹⁰ = 2×10¹¹

b) 20×10⁶ ÷(5×10⁴) = (20÷5) × (10⁶/10⁴) = 4 × 10²

c) 3×10⁴×2×10^(-3) = 6×10¹

d) (27/9) ×{ (10^(-5) )× (10^(-3) } = 3 × 10^(-2)