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3 years ago

A rectangle has an area of 36 square centimeters and a length of 9 centimeters.

Mathematics

2 answers:

melamori03 [73]3 years ago

5 0

area = $length * width$

Therefore, $width = \frac{area}{length}$

$width = \frac{36}{9}$

Width = 4cm

Sergio [31]3 years ago

3 0

Area=length * width
Length= Area/width
Width= Area/length

Width= 36/9
4

B. 4 cm

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Can someone please help me in this question

Pie

Step-by-step explanation:

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2 years ago

Football fields are 360 ft in length and 160 ft in width. Find the area

rjkz [21]

Answer:

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Step-by-step explanation:

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7 0

3 years ago

Read 2 more answers

Assume that different groups of couples use the XSORT method of gender selection and each couple gives birth to one baby. The XS

olganol [36]

Answer:

Mean and Standard deviation for the numbers of girls in groups of 36 births are 18 and 3 respectively.

Step-by-step explanation:

We are given that he X SORT method is designed to increase the likelihood that a baby will be a girl, but assume that the method has no effect, so the probability of a girl is 0.5.

Now consider a group consisting of 36 couples.

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$P(X=r)=\binom{n}{r} \times p^{r} \times (1-p)^{n-r} ;x=0,1,2,3,.....$

where, n = number of trials (samples) taken = 36 couples

r = number of success

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of a girl, i.e.; p = 0.5

Let X = Numbers of girls in groups of 36 births

So, X ~ Binom(n = 36, p = 0.5)

Now, mean for the numbers of girls in groups of 36 births is given by;

Mean, E(X) = $n \times p$ = $36 \times 0.5$ = 18

Also, standard deviation for the numbers of girls in groups of 36 births is given by;

Standard deviation, S.D.(X) = $\sqrt{n\times p\times (1-p)}$

= $\sqrt{36\times 0.5\times (1-0.5)}$

= 3

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lesya [120]

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natulia [17]

Answer:

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