These problems I really don't understand and really need serious help :)

Question

1.What the product of (5.1 x 10^3)x
(3.2 x 10^3)?(Please express your answer in scientific notation)
16.32 x 10^6 ....
1.632 x 10^7
16.32 x 10^9
1.632 x 10^10

2.What is the product of (7.28 x 10^-2)x(9.1 x 10^-2)? (Please express your answer in scientific notation)
6.6248 x 10^-3
66.248 x 10^-4 .....
6.6248 x 10^4
66.248 x 10^-3

3.What is the quotient of (2.965 x 10^7)
:(5x10^3)? :=divide
14.825 x 10^4
5.93 x 10^5
14.825 10^5
5.93 10^3 .....

4.Find the product.(4.0 x 10^-2)x
(5.2 x 10^8)
20.8 x 10^8 ....
2.08 x 10^7
2.08 x 10^6
20.8 x 10^7

Answer 1

1. Correct

2. Correct

3. Correct

4. Is B, not A. You need to watch how many digit spaces each one has.

A. 20.8 x 10^8 = 2,080,000,000
B. 2.08 x 10^7 = 20,800,000

So, B is the answer.

I hope this helps! :)

Answer 2

Okay if you submitted those answers you made a 50 like me. but i suppose that's what i get right. The answers are actually
B
A
D
B

Answer 3

William is correct

B
A
D
B

Answer 4

Thx William and YOLO. Got 100%. :D

Answer 5

Yup, Bill and Conner are indeed correct... I feel like I should know something.... NAH!

Answer 6

YOLO and William are still correct!

Answer 7

B a d b is correct for 2020