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Fiesta28 [93]
3 years ago
14

16 is 20% of what number?

Mathematics
2 answers:
ololo11 [35]3 years ago
8 0

Answer:

80

Step-by-step explanation:

20% × ? = 16


? =


16 ÷ 20% =


16 ÷ (20 ÷ 100) =


(100 × 16) ÷ 20 =


1,600 ÷ 20 =


80;

ehidna [41]3 years ago
4 0

Answer:

80

Step-by-step explanation:

80 * 20% = 16

then 16 is 20% of 80

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22
mina [271]

Answer:

b

Step-by-step explanation:

3 0
2 years ago
Which of these graphs represents an even function?
lidiya [134]
D because I’ve done this test before
6 0
2 years ago
A news report states that the 99% confidence interval for the mean number of daily calories consumed by participants in a medica
expeople1 [14]

Answer:

The sample mean is of 1925 calories.

The margin of error is of 75 calories.

The sample standard deviation is of 109.7992 calories.

Step-by-step explanation:

Sample mean:

The sample mean is the mean value of the two bounds of the confidence interval. So

M = \frac{1850 + 2000}{2} = 1925

The sample mean is of 1925 calories.

The margin of error

Difference between the bounds and the sample mean. So

2000 - 1925 = 1925 - 1850 = 75 calories.

The margin of error is of 75 calories.

Sample standard deviation:

Here, I am going to expand on the t-distribution.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 18 - 1 = 17

99% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 17 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.99}{2} = 0.995. So we have T = 2.898

The margin of error is:

M = T\frac{s}{\sqrt{n}}

In which s is the standard deviation of the sample and n is the size of the sample.

Since M = 75, T = 2.898, n = 18

M = T\frac{s}{\sqrt{n}}

75 = 2.898\frac{s}{\sqrt{18}}

s = \frac{75\sqrt{18}}{2.898}

s = 109.7992

The sample standard deviation is of 109.7992 calories.

6 0
2 years ago
Find the missing side of each triangle.<br><br> Help please !!
Sveta_85 [38]

Answer:

1)12²+9²=225

X=15km

2)12²+x²=13²

x²= 169-144

x²=25

x=5mi

8 0
3 years ago
B
morpeh [17]

Answer:

first option

Step-by-step explanation:

I'm not really sure myself but I think the first option is the best option to choose because the others aren't really that true and if you look the angle c is much bigger than the other angles so I think the first option is more likely

6 0
3 years ago
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