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3 years ago

What’s the ratio of the area? 250/686 25/49 5/7 125/343

Mathematics

1 answer:

earnstyle [38]3 years ago

4 0

Answer:

Your answer is 25:49

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By finding the size of each exterior angle of a regular polygon with 24 sides, calculate the size of each interior angle of the

Dima020 [189]

We can find the sum of the interior angles of a regular polygon using the formula : (n-2) x 180, where n is the number of sides.

We replaced in : (24-2) x 180 = 3960

So, all the interior angles in this polygon add up to 3960.
-> Each interior angle is equal to 3960 : 24 = 165.

5 0

2 years ago

An adult can lose or gain two pounds of water in the course of a day. Assume that the changes in water weight are uniformly dist

Levart [38]

Answer:

Standard deviation of the weight over a day is 1.15

Step-by-step explanation:

Since it is given that water weight is uniformly distributed between -2 to 2.

So applying formula for variance of uniformly distribution as follows,

$variance=\dfrac{\left (b-a\right )^{2}}{12}$

From the given data, values of a and b is , $a=-2$ , $b=2$ ..

Substituting the values,

$variance=\dfrac{\left (2-\left (-2 \right )\right )^{2}}{12}$

Now, $-\left ( -2 \right )=2$

$variance=\dfrac{\left (2+2\right )^{2}}{12}$

$variance=\dfrac{\left (4\right )^{2}}{12}$

$variance=\dfrac{16}{12}$

Dividing the fraction by 4,

$variance=\dfrac{4}{3}$

So, the value of variance is $\dfrac{4}{3}$

The formula for standard deviation is given as,

$Standard\:deviation=\sqrt{variance}$

Substituting the value,

$Standard\:deviation=\sqrt{\dfrac{4}{3}}$

$Standard\:deviation=1.15470$

Rounding to 2 decimal places,

$Standard\:deviation=1.15$

So, the value of standard deviation is 1.15.

4 0

3 years ago

Read 2 more answers

Lucy has 4 more than 1/3 the number of pairs of socks as her sister. Lucy has at most 9 pairs of socks. How many pairs of socks

Volgvan

Answer: at most 15 pairs of socks

Step-by-step explanation:

Let the number of pair of socks of her sister be $x$ , and let the number of pairs Lucy has be $y$ .

Since , Lucy has 4 more than 1/3 the number of pairs of socks as her sister, this means that

$\frac{1}{3}x + 4 = y$ .............................. equation 1

Also , Lucy has at most 9 pairs of socks , this means that

$y\leq 9$ ....................................... equation 2

Equating the two equations , we have

$\frac{1}{3}x + 4 \leq 9$

multiply through by 3

$x + 12\leq 27$

subtract 12 from both sides

$x\leq 15$

Therefore , the sister has at most 15 pairs of socks

4 0

3 years ago

the ratio of chaperones to students a field trip is 1 to 9 if 81 students on the trip how many chaperones were there

kati45 [8]

In the given question it is important to take note of every minute details that are given in the question. using these details the answer to the given question can be easily reached.
Let us assume the common ratio to be x.
Then
x + 9x = 81
10x = 81
x = 81/10
= 8.1
A s we already know that the ratio of chaperones to students is 1:9
Then
The number of chaperones = 1 * 8.1
= 8.1
So 8.1 chaperones were there in total. I hope you have got the answer you were looking for.

4 0

3 years ago

Simplify the expression. parenleftze9x + 1 2 parenrightze + parenleftze4x − 7 1 2 parenrightze

KiRa [710]

Answer:

13e^3lnparftzx-700

Step-by-step explanation:

1. Group the like terms.

9eeelnparftzx + 4eeelnparftzx + 12 - 712

2. Add similar elements: 9eeelnparftzx + 4eeelnparftzx = 13eeelnparftzx

13eeelnparftzx + 12 - 712

3. 13eeelnparftzx = 13e^3lnparftzx (the three "e" will transform into e^3)

13e^3lnparftzx + 12 - 712

4. Add and Subtract the numbers: 12 - 712 = -700

13e^3lnparftzx - 700

7 0

3 years ago