Question

Please solve all these questions

Answer 1

a.
$((1 \div 3)^{ - 1} - (1 \div 4)^{ - 1} )$
$(3 - 4)^{ - 1}$
$( - 1)^{ - 1}$
$= 1 \div - 1$
$= - 1$
Wish it helped u a little at least!!

Answer 2

3.
ii) -5^3m-1*25=-5^-8

-5^3m-1=-5^-8/-5^2
-5^-10

3m-1=-10
3m=-9
m=-3

4.
i) 5970000000000000000000000
73500000000000000000000

6043500000000000000000000

6.0435*10^24