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Dominik [7]
3 years ago
10

he isotope titanium-44 decays into scandium-44, with a half-life of 60 years. In a sample of titanium-44 containing 2 × 1010 ato

ms, how many titanium-44 and scandium-44 atoms would there be in the sample after 240 years?

Mathematics
1 answer:
trapecia [35]3 years ago
3 0
Work shown in the picture. There are 1.25 x 10^9 titanium-44 atoms and 1.875 x 10^10 scandium-44 atoms.

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PLEASE HELP!!
aev [14]

Answer:

D. No, because P(A|B)=0.22 and the P(A) = 0.53 are not equal.

Step-by-step explanation:

Given:

Probability of doing yard work is, P(A)=53\%=0.53

Probability of raining, P(B)=68\%=0.68

Probability of doing yard work and it raining is, P(A\cap B)=15\%=0.15

Now, two events A and B are independent if,

P(A|B)=P(A);P(B|A)=P(B)

Conditional probability of event A given that B has occurred is given as:

P(A|B)=\frac{P(A\cap B}{P(B)}\\P(A|B)=\frac{0.15}{0.68}=0.22

So, P(A|B)=0.22\ and\ P(A)=0.53

Since, P(A|B)\ne P(A), A and B are not independent events.

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3 years ago
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4 0
3 years ago
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Find the sum of -44, -10, and 49​
Dmitriy789 [7]

Answer:

-5

Step-by-step explanation:

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Ben ran 3/10 of a mile. Shelly ran 8/10 of a mile. How many more miles did Shelly run than Ben? A) 11/10 B) 11/20 C) 5/0 D) 5/10
attashe74 [19]

Hello there! Shelly ran D) 5/10 more miles than Ben.

To find the difference between the two runner's distances, subtract the smaller distance from the greater distance.

8/10 - 3/10 = 5/10

Since there is a difference of 5/10, this means Shelly ran 5/1 more miles.

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Answer:

12

Step-by-step explanation:

Hope  this helps

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