Work out (5X10^3) x (9X10^7) answer in standard form plz

4.5x10^11

Step-by-step explanation:

= (5x10^3) x (9x10^7)

= 4.5x10^11

4.5×10¹¹

i) use the commutative property to rearrange the terms: a+b = b+a

ii) multiply the number in the 1st bracket

iii) multiply the 2nd bracket by adding their exponents

iv) write the answer in standard form

a; x = 0.5

step-by-step explanation:

-10x = -5

x = 0.5