Question

40 PTS!!! IF YOUR GUESSING ORRANDOM WORDS I WILL REPORT AND GET MY POINTS BACK PLEASE IT'S TIMED, I PROMISE BRAINLIST... IT'S SIMPLE PLEASEEEE
11. Which of the following expressions is true?


A. 4^3• 4^4 = 412

B. 5^2 • 5^3 > 5^5

C. 3^2 • 35 < 3^8

D. 5^2 • 54 = 58


12. Which of the following expressions is true?


A.8^3 • 8^2 < 8^4

B. 4^4 • 4^4 = 4^16

C. 2^2 • 2^6 < 2^8

D. 3^3 • 3^3 > 3^5




Write the value of the expression.

13. 3^4/3^4


A. 3

B. 0

C. 1

D. 4


14. 4^7/4^9


A. –16

B. 1/16

C. 1/8

D. 8


Multiply. Write the result in scientific notation.

15. (2.3 • 10^1)(7 • 10^6)


A. 1.61 • 10^7

B. 1.61 • 10^8

C. 9.3 • 10^6

D. 9.3 • 10^7


16. (1.7 ∙ 10–4)(5 ∙ 10–5)


A. 8.5 ∙ 10^–9

B. 8.5 ∙ 10^20

C. 6.7 ∙ 10^–9

D. 6.7 ∙ 10^20


Simplify the expression.

17. 7t4 ∙ 7t4


A. 49t^8

B. 14t^4

C. 49t^16

D14t^8


Simplify the expression.

18. –x(7x – 8)

A. 6x^2 – 9x

B. –7x – 8x

C. –7x^2 + 8x

D. 7x + 8x


Simplify the expression.

19. 4k2(–3k2 – 4k + 5)

A. –12k^4 – 16k^3 + 20k^2

B. 12k^4 – 16k^3 + 9k^2

C. –12k^3 + 20k

D. k4 + 9k^2


Simplify the expression.

20. (2k + 1) (k – 4)


A. 2k^2 – 7k + 4

B. 2k^2 –3k + 4

C. 2k^2 + 9k + 4

D. 2k^2– 7k – 4

Answer 1

Answer:

11. C. 315< 6561

12. D. 729>243

13. C. 1

14. B. 1/16

15. B. 1.61*10^8

16. A. 8.5*10^-9

17. A. 49t^8

18. C. -7x^2+8x

19. A. -12k^4-16k^3+20k^2

20. D. 2k^2-7k-4

I didn't guess. It would just take a long time to show all the work I did