Answer:
x>10
Step-by-step explanation:
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The amount of the radioactive material in the vault after 140 years is 210 pounds
<h3>How to determine the amount</h3>
We have that the function is given as a model;
f(x) = 300(0.5)x/100
Where
- x = number of years of the vault = 140 years
- f(x) is the amount in pounds
Let's substitute the value of 'x' in the model
f(x) = 300(0.5)x/100


f(140) = 210 pounds
This mean that the function of 149 years would give an amount of 210 pounds rounded up to the nearest whole number.
Thus, the amount of the radioactive material in the vault after 140 years is 210 pounds
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is one of the prime factors of the polynomial
<h3>How to factor the expression?</h3>
The question implies that we determine one of the prime factors of the polynomial.
The polynomial is given as:

Expand the polynomial by adding 0's in the form of +a - a

Rearrange the terms

Factorize the expression

Factor out x^6-2x^5+2x^3-3x^2+2x-1

Express x^2 + 2x + 1 as a perfect square

Expand the polynomial by adding 0's in the form of +a - a

Rearrange the terms

Factorize the expression

Factor out x^3-2x^2+x-1

One of the factors of the above polynomial is
.
This is the same as the option (c)
Hence,
is one of the prime factors of the polynomial
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There are 13 spades in a standard deck of cards, so if the first one is a spade, there are 12 spades left.
So the chances of getting another one would be 12/52 because there are 52 cards in a standard deck of cards.
Reduced, your answer is 3/13