$Use:(a\cdot b)^n=a^n\cdot b^n\\\\(a^n)^m=a^{n\cdot m}\\\\a^{-n}=\dfrac{1}{a^n}\\\\\left(4x^{-4}\right)^{-3}=4^{-3}(x^{-4})^{-3}=\dfrac{1}{4^3}x^{-4\cdot(-3)}\\\\=\dfrac{1}{64}x^{12}=\boxed{\frac{x^{12}}{64}}$

Answer: D. x^12/64

3 0

2 years ago

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Paul burned 65 calories in 15 minutes. How many calories did he burn in 1 hour? Please show how got to your answer!

stira [4]

Answer:

65 calories=15 minutes

Find how many minutes it will take Paul to born 1 calory. You divide 65 by 15

65÷15=4.333

Find how many calories lost in 1 hour= 60 minutes multiply by 4.3

60*4.333=260 calories

Therefore,

Paul burns 260 calories in 1 hour

7 0

2 years ago

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Which of the following best represents a compound?

Ronch [10]

Answer:

The answer to your question is: Salt

Step-by-step explanation:

Element: is a substance that cannot be converted into another substance.

Compound: is a substance that is formed by 2 or more elements.

Mixture: is a substance composed by 2 or more compounds.

Iron it is an element

Salt it is a compound

River sediment it is a mixture

Ocean water it is a mixture

7 0

3 years ago

What is the least common denominator of 3/20 and 8/15? A.30 B.20 C.5 D.60

Sidana [21]

5 since both numbers are divisible by 5 and not by any smaller number

6 0

3 years ago

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