I need help on all three questions provided I'll mark you as the brainiest and friend you.

11. 10^-8 = 1 • 10^-8 in decimal form

12. 6 • 10^-4 = 0.0006 in decimal form

13. n^m turns into 5^4

5 • 5 • 5 • 5 = 625
5^4 = 625

Do the math. she originally had 50 dollars on her gift card and she had 12 dollars left on her gift card after she finished her shopping spree. if you subtract 50 minus 12 you get thirty eight dollars as your answer. so therefore, ciara spent 38 dollars total o