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Nata [24]
3 years ago
10

Element U has a half life of T billion years. Find the half life of this element if 1/6 of the original amount is left after 11.

55478 billion years.
Mathematics
1 answer:
olga2289 [7]3 years ago
7 0

Answer:

Step-by-step explanation:

Thick

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Roll two fair dice. Each die has six faces. A. Let A be the event that either a 3 or 4 is rolled first followed by an odd number
zhenek [66]

Answer:

A. 0.16

B. 0.58

C. No

D. Dependent

Step-by-step explanation:

A.

The sampling space has 36 outcomes.

The event A has 6 outcomes (3,1), (3,3), (3,5), (4,1), (4,3),(4,5)

So P(A)= 6/36 = 0.16

B.

The table in the picture shows the 15 outcomes that are not allowed, so there are 36-15 = 21 possible outcomes for B and its probability is 21/36 = 0.58

C.

Are A and B mutually exclusive events?

No since their intersection is not empty, for example (3,1) belongs to both A and B

D.

In order for A and B to be independent, it must happen that

P(A∩B)=P(A)P(B)

A∩B={(3,1),(3,3),(4,1)} so P(A∩B) = 3/36  

whereas

P(A)P(B) = (6/36)(21/36) = (1/6)(7/12)=7/72

So A and B are not independent.

7 0
3 years ago
Jy is hiking glacier national park he now has hiked a total of 17 km and is 2 km short of being 1/2 of the way done with his hik
anastassius [24]

Jy has hiked 17km

He is 2km short of being half of the way done with hicking

Let the total distance he hiked be xkm

Then 1/2x = 17 + 2km

1/2x = 19km

x = 19 × 2 = 38km

The total distance he covered was 38km.

7 0
3 years ago
The distance between two parks on a city map is 1.8 inches. The actual distance between the parks is 2 miles. In the same city,
Nata [24]
0.72 or the first option. Hope this helps.
8 0
3 years ago
Need help for 15 points please!
AfilCa [17]

Answer:

the last one luv Tpwk Byeeee now

Step-by-step explanation:

I Think, if the other person gets it right listen to them

6 0
2 years ago
Please help.<br> A<br> B<br> C<br> D
s344n2d4d5 [400]

Answer:

A. t(x) = 450 - 0.06x

Step-by-step explanation:

The layer which is originally 450 m thick is decreasing by 0.06 m.

450 - 0.06

... per day. x represents days.

0.06x

So,

450 - 0.06x

6 0
3 years ago
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