Question

1. What is 0.48 written as a simplified fraction?
A. 100/48
B. 24/50
C. 12/25 >> My answer
D. 48/100

2. Ms. Kim's class is having a pizza party. If there are 21 students and 6 pizzas cut into 8 slices, what answer choice represents the fraction of one pizza that each student receives?
A. 1/8
B. 2/7
C. 7/8
D. 21/48

3. What makes the statement true? 6-^3 =?
A. -18
B. -1/216
C. 1/216
D. -216

4. Based upon a 2020 census data, the total population of India is 1,380,004,385 people. Approximately what is this population in scientific notation.
A. 1.4 x 10^9
B. 1.4 x 10^8
C. 14 x 10^8
D. 1.4 x 10^-9

5. What is the solution to (3x10^7) x (7 x 10^5), written in scientific notation?
A. 21 x 10^12
B. 2.1 x 10^12
C. 21 x 10^35
D. 2.1 x 10^13

Answer 1

1.

Correct

0.48 = 48 / 100 = 4 • 12 / 4 • 25 = 12 / 25

2.

None of the answers are correct.

6 pizzas cut into 8 slices = 6 • 8 = 48 slices

48 / 21 = 3 • 16 / 3 • 7 = 16 / 7

3.

6-^3 = 1 / 6^3 =

Answer 2

6-^3 = 1 / 6^3 = 1 / 216

4.

1,380,004,385 = 1.380004385 • 10^9

approx. 1.4 • 10^9

5.

3 • 10^7 • 7 • 10^5 =

3 • 7 • 10 ^7 • 10 ^ 5 = 21 • 10^{ 7+ 5 ) =

21 • 10 ^12 = 2.1 • 10 • 10^12 =

2.1 • 10^1 • 10^12 = 2.1 • 10 ^( 1 + 12 ) =

2.1 • 10^13