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Sonbull [250]
3 years ago
10

A B C or D? With correct workings

Mathematics
1 answer:
goldenfox [79]3 years ago
3 0

Answer:

A  the first choice

Step-by-step explanation:

Sin theta = opp/ hypotenuse

sin A = 12/16

12 must be opposite angle A and 16 must be the hypotenuse

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How do I show the work to figure out, how many inches are in 4.2 meters
serg [7]
4.2 times 39.37 = 165.354
3 0
2 years ago
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
A frame is 4 inches tall and 3 inches wide if it is enlarged to a height of 24 inches then how wide will it be
Katarina [22]
Height: width
4:3 = 24:x
x = 18
The frame will be 18 inches wide.
8 0
3 years ago
Type the algebraic equation for this statement. Let a represent the unknown number.
Ahat [919]
2a-6
...........
5 0
3 years ago
4 + 3(x + 5) hhhhhhhhhhhhheeeeeeeeeeeeeeeeeeeeeeeeeeeellllllllllllllllllllllllllllllllppppppppppppppppppppppppppppppppppppp
zysi [14]

Answer:

3x+19

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
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