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beks73 [17]
3 years ago
11

The Median of the data set is 18.What number is missing? 12, 17,_, 21, 13,25,

Mathematics
2 answers:
miv72 [106K]3 years ago
5 0

Answer:

= 15

Step-by-step explanation:

21 + 15 = 36

36/2 = 18

Therefore, 15 is the missing number :33

kiruha [24]3 years ago
4 0

Answer:

15.

Step-by-step explanation:

There are  6 ( even number) of values in the data so:-

the median is the mean of the 2 middle numbers.

Therefore, we have:

(x + 21)/2 = 18 where x is the missing number.

x + 21 = 2*18

x = 36 - 21 = 15.

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4x - 8 = 4x +<br> Sidjwjdjdjwndnd
larisa86 [58]

Answer:

Step-by-step explanation:

4x - 8 = 4x

4x - 4x = +8

x = 8

3 0
4 years ago
A solid circular cylinder has a base radius 5 cm and a height 12.5 cm. Find the approximate increase in the surface area of the
Olin [163]

Answer:

19.72 cm²

Step-by-step explanation:

A solid circular cylinder has a base radius 5 cm and a height 12.5 cm.

The volume of cylinder is given by :

V=\pi r^2 h\\\\=3.14\times (5)^2\times 12.5\\\\=981.25\ cm^2

When r = 5.05, new volum becomes,

V=\pi r^2 h\\\\=3.14\times (5.05)^2\times 12.5\\\\=1000.97\ cm^2

Increase in area = 1000.97 - 981.25 = 19.72 cm²

So, the increase in surface area of the cylinder is equal to 19.72 cm².

6 0
3 years ago
Marie and Jorge are both trying to lose weight. After 3 months they compared their weight loss. Marie’s weight went from 175 to
Nonamiya [84]
Since I do not have answer choices, I can conclude things that may or may not be an answer choice. Just from the problem, you can tell that Marie lost more weight, because 175 -150 = 25, while 190 - 180 = 10. Indirectly, you can say that she might have worked out more, or changed her diet, although that would merely be an inference. If you have answer choices please let me know and I can answer more. Hope this helps. Please rate, leave a thanks, and mark a brainliest answer (Not necessarily mine).
8 0
3 years ago
Read 2 more answers
Approximate the sum of the convergent infinite series the least usingnumber of terms so that the error is less than .0001. What
____ [38]

Solution :

$\sum_{n=1 }^{\infty } \frac{(-1)^n}{n ! 2^n}$           $a_n= \frac{(-1)^n}{n ! 2^n} \ \ \ \ \ a_{n+1}= \frac{(-1)^{n+1}}{(n+1) ! 2^{n+1}}$

Error = $|a_{n+1}|$

Error ≤ 0.0001

$|\frac{(-1)^{n+1}}{(n+1)!2^{n+1}}| \leq 0.0001$

$|\frac{1}{(n+1)!2^{n+1}}| \leq 10^{-4}$

$(n+1)! 2^{n+1} \geq 10000$

Now try, n ≥ 5

$\sum_{n=1 }^{\infty } \frac{(-1)^n}{n ! 2^n}$   = $\sum_{n=1 }^{5 } \frac{(-1)^n}{n ! 2^n}$         (with error 0.0001)

 

$\sum_{n=1 }^{\infty } \frac{(-1)^n}{n ! 2^n}$   = $\frac{-1}{1!2}+\frac{1}{2!2^2}-\frac{1}{3! 2^3}+\frac{1}{4! 2^4}-\frac{1}{5! 2^5}$

$\sum_{n=1 }^{\infty } \frac{(-1)^n}{n ! 2^n}$ = 0.6065104

3 0
3 years ago
A 100-point test contains a total of 20 questions. The multiple-choice questions are worth 3 points each, and the short response
Lena [83]

Answer: 8 short response questions and 12 multiple choice questions

Step-by-step explanation:

Let m represent multiple choice questions

Let s represent short response questions

m + s = 20 --> Amount of questions

3 m + 8 s = 100 --> Total number of points for each question

Solve using elimination, multiply the first equation by -3

-3m-3s=-60

3 m + 8 s = 100

----------------------

5s=40

s=8

m+8=20

m=20-8

m=12

Therefore, there are 8 short response questions and 12 multiple choice questions

4 0
3 years ago
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