Question

Can you help it is a practices but i need help because it will show on my grade book thank you it is lesson 4 unit 1

Answer 1

1. Simplify. 5–1(3–2) (1 point)
A)45
B)1/45
C)15^–3
D)15^2 ----------------
2. Simplify. mn^-4/p^0q^-2 (1 point)
A)mq^2/n^4
B)mp/n^4
C)mn^4q^2p^0
D)q^2/mn^4 ----------------
3. Write in scientific notation. 0.0042 (1 point)
A)42 × 10^2
B)4.2 × 10^4
C)4.2 × 10^3 ----------------
D).42 × 10^4
4. Write in standard notation. 6.12 × 10^3 (1 point)
A)6,120 ----------------
B)612
C)61,200
D)61.2
5. Simplify. Write in scientific notation. 0.5(8 × 10^5) (1 point)
A)8 × 5^5
B)4 × 5^5
C)8 × 10^5
D)4 × 10^5 ----------------
6. Simplify. Write in scientific notation. (9 × 10^3)^2 (1 point)
A)8.1 × 10^5
B)81 × 10^4
C)81 × 10^3
D)8.1 × 10^6 ----------------
7. Evaluate 1/2a^4b^2 for a = –2 and b = 4. (1 point)
A)2 ----------------
B)1/2
C)3
D)4
8. Is the following statement always, never, or sometimes true?
A number raised to a negative exponent is negative. (1 point)
A)always
B)never
C)sometimes ----------------
9. Simplify (4xy^2)^3(xy)^5 (1 point)
A)64x^8y^11
B)64x^15y^30
C)12x^2y^11
D)12x^8y^11 ----------------
10. Simplify (2t^3)^3(0.4r)^2 (1 point)
A)3.2r^2
B)1.28r^2/t^-6 ----------------
C)1.28r^2/t^9
D)0.8r^2/t^-6

Answer 2

can you help me

Answer 3

@MiaPonce0827

Answer 4

check my answers please thanks

Answer 5

i believe 8 is never, because a negative exponent becomes 1/

ex: a^-b = 1/a^b

Answer 6

6 is A

Answer 7

how did you get a for 6 and can you help me with 7

Answer 8

bases are the same so just add 3+2 (the exp)

I don't get 7,9,10 D:

Answer 9

too messy

Answer 10

thank you for helping me @ryanvarghese12790

Answer 11

1)a. 1/45
2)q^-2n^-4m
3. Write in scientific notation. 0.0042 (1 point)
4.2 × 10–3

4. Write in standard notation. 6.12 × 103 (1 point)
6,120

5. Simplify. Write in scientific notation. 0.5(8 × 105) (1 point)
4 × 10^5

6. Simplify. Write in scientific notation. (9 × 10–3)2 (1 point)
8.1 × 10–5

7. Evaluate a–4b2 for a = –2 and b = 4. (1 point)

Again, I can't understand what this question is asking.

8. Is the following statement always, never, or sometimes true?

A number raised to a negative exponent is negative.

Answer 12

@S17.

Answer 13

thank you

Answer 14

don't read this it only gets you a 50% at that