Can some help and explain this please?

Answer:
a. [tex]10^{3}[/tex] [tex]10^2[/tex]
b. 10 [tex]10^2[/tex]
Step-by-step explanation:
[tex]10^{2}[/tex] = 100 -> so 100*0.005= 5
if you still dont understand search up "scientific notation"
Answer:
a. 10³ × 0.005 =5
a. 10²×0.005=0.5
b . 0.09×10 = 0.9
b. 0.009 ×10³ = 9
Step-by-step explanation:
a. ___ × 0.005 = 5 —> 5 ÷ 0.005 = 1000 So; 1000 = 10³
a. ___ × 0.005 = 0.5 —> 0.5÷0.005=100 So; 100=10²
b. 0.09 × ___=0.9 —> 0.9 ÷ 0.09= 10 So; 10
b. 0.009 × ___=9 —> 9÷ 0.009= 1000 So; 1000=10³
I hope I helped you^_^