Question

please solve it. I need urgent help plz plz​

Answer 1

Answer:

(1). 81 and 4

(2). 1

(3).1/8

Answer 2

Answer:

1. 1) 1/81 and 4
2. a power m x a power n=a power m+n so a square x a cube=a power5  a power5 x a power -5 =a power 0=1
3. (√4)⁻³=(1/√4)⁻³=(1/2)⁻⁻³=2³=8
4. 837x10⁻¹¹
5. (11/9)³ x (9/11)⁶=(11/9)²ˣ⁻¹ we can write  (9/11)⁶=(11/9)⁻⁶ then (11/9)³ x (11/9)⁻⁶=(11/9)²ˣ⁻¹⇒(11/9)⁻³=(11/9)²ˣ⁻¹ ⇒2x-1=-3⇒2x=-2⇒x=-1
6. (25×t⁻⁴)/8⁻³ˣ10xt⁻⁸=25x10⁻⁴x t⁸x10⁻¹x8³=25x8³x10⁻⁵x t⁸=12800x10⁻⁵x t⁴=128x10²x10⁻⁵=128x10⁻³=0.128

1. Step-by-step explanation