Answer:
513.881
Explanation: (Credits to jessy276)
= 5*100+3+10+8*0.1+9*0.009
= 500+3+10+8*0.1+9*0.009
= 500+3+10+0.8+9*0.009
= 500+3+10+0.8+0.081
= 503+10+0.8+0.081
= 513+0.8+0.081
= 513.8+0.081
= 513.881
The answer is 513.881
Step-by-step explanation
