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GenaCL600 [577]
3 years ago
8

A coin is tossed and a standard number cube is rolled. What is the probability that the coin shows heads and the number cube sho

ws a number less than 2?
Mathematics
2 answers:
leva [86]3 years ago
3 0

Answer:

1/12

Step-by-step explanation:

coin toss: 1/2

cube roll: 1/6     (less than 2, only 1 one event)

1/2 x 1/6 = 1/12

Sergio [31]3 years ago
3 0

Answer:

the answer will be 1/2

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You have two parents, four grandparents, eight greatgrandparents, and so forth.
Leviafan [203]
A.
In the first generation we have 2 ancestors.
In the second generation we have 4 ancestors or 2^{2} ancestors.
In the third generation we have 8 ancestors ot 2^{3} ancestors.

We can see that each succesive generation has two times more members. The sum is:
2+4+8+16+...+ 2^{40}

To calculate number of ancestors we can use formula <span>for the sum of a geometric sequence. Geometric sequence is sequence of numbers that differ by a certain factor. This factor is called ratio. Formula is:
</span>S= a_{1} * \frac{1- r^{n} }{1-r}
<span>Where:
S -> sum
a1 -> first member of a sequence
r -> ratio
n -> number of elements

For this question:
a1 = 2
r = 2
n = 40
</span>S= 2* \frac{1- 2^{40} }{1-2} =2 199 023 255 550
<span>
b.
1 generation = 25 years
40 generations = 40 * 25 = 1000 years

c.
Total number of people who have ever lived = </span>10^{10}
Number of ancestors in 40 generations = 2.2*10^{12}

The number of ancestors is greater than total number of people who have ever lived. This means that not all ancestors were distinct and that in each generation both men and women had children with more than one partner.
8 0
3 years ago
1.
Ivenika [448]
Here’s the full solution:

(Please mark as BRAINLIEST that would mean a lot to me)

4 0
2 years ago
the cost of a school banquet is $95 plus $15 for each person attending. write an equation that gives total cost as a function of
AleksandrR [38]

Im sorry if I misunderstood the problem but heres my take.

Answer:

1155 for the cost of the people and 1250 for the total including the $95

Step-by-step explanation:

Multiply it ( 77 x 15 )

then add the answer to the $95 ( 95 + N )

= $N

8 0
3 years ago
HELP ME PLEASE!!!!!!
Eva8 [605]
I realise this is quite late but in case you still wanted the answer, the width is 3m.

If the length is 3m longer than the width, you can write the width as x and the length as x + 3. The perimeter would be both lengths and both widths added together, so you would just write it as:
x + x + x + 3 + x + 3 = 18
4x + 6 = 18
- 6
4x = 12
÷ 4
x = 3

I hope this helps!
4 0
3 years ago
In Ms. Jordan's math class,
vovangra [49]

Answer:

there are 27 female

Step-by-step explanation:

3 0
3 years ago
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