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MArishka [77]
3 years ago
11

Count the left-handed and right-handed spirals on the cacti in the photograph. You should get two consecutive terms of the Fibon

acci sequence. What are the numbers? A. 34 and 55 B. 5 and 8 C. 8 and 13 D. 21 and 34 E. 13 and 21
Mathematics
1 answer:
fenix001 [56]3 years ago
4 0
<span>All choices are consecutive terms of the Fibonacci series. You are going to have to post the figure, or just count them like it asks.</span>
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How do you simplify 10/25
sammy [17]
You have to find out what can go into both five can go into both so 10÷5 is two and 25÷5 is five so the answer is 2/5
3 0
3 years ago
Read 2 more answers
It cost Joseph $21.90 to send 146 text messages. How many text messages did he send if he spent $6.45?
Margarita [4]

Answer:

43 messages

Step-by-step explanation:

Given:

146 messages = $21.90

x messages = $6.45

Finding x by cross-multiplication:

x = 146*6.45/21.90 = 43

Hope this helps! :)

7 0
3 years ago
Suppose you want to decrease your margin of error by a factor of 3. by what factor, do you need to increase your sample size? in
elena55 [62]
The sample size, n required to produce a margin of error, M, in a probability proportion distribution is given by:

n= \frac{p(1-p)z_{\alpha/2}^2}{M^2}

The above formular shows that the sample size is inversely proportional to the Margin of error.

Then we have:

n= \frac{k}{M^2}

where k is some constant.

Now suppose we decrease M by a factor of 3,

\left(i.e.\  \frac{M_1}{M_2} =3\right)

n_1= \frac{k}{M_1^2}  \\  \\ n_2= \frac{k}{M_2^2}  \\  \\  \frac{n_2}{n_1} = \frac{k}{M_2^2} / \frac{k}{M_1^2} = \frac{k}{M_2^2} \times \frac{M_1^2}{k} = \frac{M_1^2}{M^2_2} =\left( \frac{M_1}{M_2} \right)^2=3^2=9 \\  \\ n_2=9n_1

Therefore, if we decrease the Margin of error by a factor of 3, we need to increase the sample size by a factor of 9.
6 0
4 years ago
Can someone help me on these questions?
ch4aika [34]
Me not good on math matics I sorry hybrid
6 0
3 years ago
Read 2 more answers
In the diagram, AC and PR are vertical lines, while CB is a horizontal line segment. If CR : RB = 2 : 3, what are the coordinate
Gnom [1K]

Answer:

A. (-2,-4)

Step-by-step explanation:

If CR:RB is 2:3, and C is (-4,-7), then R is (-2,-7)

You can stop here because only A has the x value as -2.

If you want to look at the y value also, -4 is 2/5 of the way between -2 and -7, which has the same 2:3 proportion.

8 0
4 years ago
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