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3 years ago

What is 3/25 written as decimal?

Mathematics

1 answer:

alexdok [17]3 years ago

4 0

$Decimals\ are\ fractions\ out\ of\ 100. \\ \\ \frac{3}{25}= \frac{(4)3}{(4)25}= \frac{12}{100} \\ \\ \boxed{0.12}$

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55 is 40% of what number

SCORPION-xisa [38]

You simply put 40 over a hundred and 55 over n (which is the number were trying to find) so you do cross multiplication. 55 times a hundred and after you get the answer. You divide it by 40 and should get 137.5.

3 0

3 years ago

Which is a simplified form of the following expression? 6c^2+2.5d - d + 2c^2-3d

melisa1 [442]

By collecting like terms we have:

$6 {c}^{2} + 2 {c}^{2} + 2.5d - d - 3d \\ \\ 8 {c}^{2} - 1.5d$

3 0

3 years ago

A cookie factory monitored the number of broken cookies per pack yesterday.

trapecia [35]

Answer:

Confidence Interval - 2.290 < S < 2.965

Step-by-step explanation:

Complete question

A chocolate chip cookie manufacturing company recorded the number of chocolate chips in a sample of 50 cookies. The mean is 23.33 and the standard deviation is 2.6. Construct a 80% confidence interval estimate of the standard deviation of the numbers of chocolate chips in all such cookies.

Solution

Given

n=50

x=23.33

s=2.6

Alpha = 1-0.80 = 0.20

X^2(a/2,n-1) = X^2(0.10, 49) = 63.17

sqrt(63.17) = 7.948

X^2(1 - a/2,n-1) = X^2(0.90, 49) = 37.69

sqrt(37.69) = 6.139

s*sqrt(n-1) = 18.2

$s\sqrt{\frac{n-1}{X^2 _{(n-1), \frac{\alpha }{2} } }$ $\leq \sigma \leq s\sqrt{\frac{n-1}{X^2 _{(n-1), 1-\frac{\alpha }{2} } }$

confidence interval:

(18.2/7.948) < S < (18.2/6.139)

2.290 < S < 2.965

8 0

3 years ago

I need accurate answer please because this is the last attempt

matrenka [14]

Answer:

I'm not very sure, however I think you have to replace the sign - for a +.

Step-by-step explanation:

7 + 4√13

3 0

4 years ago

Write (75d)1/2 in radical form

Kitty [74]

$(75d)^{ \frac{1}{2} }= \sqrt{75d}=5 \sqrt{3d}$

7 0

3 years ago