3 years ago

Please help me i seriously have no idea what im doing

Mathematics

1 answer:

Karolina [17]3 years ago

5 0

Answer:

When time watching TV increases the grade decreases

Step-by-step explanation:

U just gotta look at the graph and find the relationship

I hope that this helps you out...

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so the alternate hypothesis would be less than or equal to 0

H1: µd ≤ 0

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3 years ago

A die is rolled two separate times. What is the probability that the first roll

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1/6 times 1/2 is D. 1/12

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Liling is a salesperson at a computer store she recurves a base salary of $2,300 per month and she receives a commission of 3% o

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$3948

Step-by-step explanation:

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3 years ago

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3 years ago

A fossilized leaf contains 18% of its normal amount of carbon 14. How old is the fossil (to the nearest year)? Use 5600 years as

Sati [7]

Answer: The age of the fossilized leaf is 13829 years.

Step-by-step explanation:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant

t = age of sample

a = let initial amount of the reactant = 100

a - x = amount left after decay process = $\frac{18}{100}\times 100=18$

a) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

$t_{\frac{1}{2}}=\frac{0.693}{k}$

$k=\frac{0.693}{5600years}=0.00012years^{-1}$

b) for finding the age

$t=\frac{2.303}{0.00012}\log\frac{100}{18}$

$t=13829years$

The age of the fossilized leaf is 13829 years.

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3 years ago