Answer:
780,000,000
1,500,000,000
15625
Step-by-step explanation:
[tex]10^{8}[/tex] = 100,000,000
7.8 x 100,000,000 = 780,000,000
[tex]10^{9}[/tex] = 1,000,000,000
1.5 x 1,000,000,000 = 1,500,000,000
[tex]5^{0}[/tex] = 1
([tex]5^{3}[/tex])² = [tex]5^{3}[/tex] x [tex]5^{3}[/tex] = 125 x 125 = 15625
15625 x 1 = 15625
