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marta [7]
3 years ago
7

Correct answer gets brainliest.

Mathematics
1 answer:
Bond [772]3 years ago
7 0
P(x) = 3x³ + 2x² - 3x + 5
p(x) \:  =  \: 3 {x}^{3}  \:  +  \: 2 {x}^{2}  \:   -  \: 3x \:  +  \: 5
When x = 1/2,
p( \frac{1}{2} ) \:  =  \: 3 {( \frac{1}{2}) }^{3}  \:  +  \: 2 {( \frac{1}{2}) }^{2}  \:  -  \: 3( \frac{1}{2} ) \:  +  \: 5
p( \frac{1}{2} ) \:  =  \: 3( \frac{1}{8} ) \:  +  \: 2( \frac{1}{4} ) \:  -  \: 3( \frac{1}{2} ) \:  +  \: 5
p( \frac{1}{2} ) \:  =  \:  \frac{3}{8}  \:  +  \:  \frac{2}{4}  \:  -  \:  \frac{3}{2} \:  +  \: 5
p( \frac{1}{2} ) \:  =  \:  \frac{3}{8}  \:  +  \:  \frac{4}{8}  \:  -  \:  \frac{12}{8}  \:  +  \:  \frac{40}{8}
p( \frac{1}{2} ) \:  =  \:  \frac{35}{8}
p( \frac{1}{2} ) \:  =  \: 4 \frac{3}{8}

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Ivenika [448]
5x8= 10x4
40=40
40 is equal to 40
4 0
3 years ago
The half life of uranium-232 is 68.9 years. (show step by step)
dalvyx [7]

Answer:

1.) 8.09g ; 2) 206.7 years

Step-by-step explanation:

Given the following :

Half-life(t1/2) of Uranium-232 = 68.9 years

a) If you have a 100 gram sample, how much would be left after 250 years?

Initial quantity (No) = 100g

Time elapsed (t) = 250 years

Find the quantity of substance remaining (N(t))

Recall :

N(t) = No(0.5)^(t/t1/2)

N(250) = 100(0.5)^(250/68.9)

N(250) = 100(0.5)^3.6284470

N(250) = 100 × 0.0808590

= 8.0859045

= 8.09g

2) If you have a 100 gram sample, how long would it take for there to be 12.5 grams remaining?

Using the relation :

N / No = (1/2)^n

Where N = Amount of remaining or left

No = Original quantity

n = number of half-lifes

N = 12.5g ; No = 100g

12.5 / 100 = (1/2)^n

0.125 = (1/2)^n

Converting 0.125 to fraction

(1/8) = 1/2^n

8 = 2^n

2^3 = 2^n

n = 3

Recall ;

Number of half life's (n) = t / t1/2

t = time elapsed ; t1/2 = half life

3 = t / 68.9

t = 3 × 68.9

t = 206.7 years

7 0
3 years ago
Sam found $1.8 After finding the money in his pocket, Sekou finds an additional $0.75 in his backpack. Then he decides to buy a
Kitty [74]

Answer:

Hey there!

Sam's Money=1.80 dollars + 0.75 dollars.

1.80+0.75-1.50=1.05

1.05/0.13= 8.08.

He will be able to buy 8 pieces of gum.

Let me know if this helps :)

7 0
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nataly862011 [7]
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With which set of information can you construct a unique triangle?
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I believe the answer is d
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