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3 years ago

If elephant grass grows 2 1/3 inches a day, how many inches will it grow in 8 days?

Mathematics

2 answers:

geniusboy [140]3 years ago

8 0

2 1/3 * 8 = 16 8/3 or 18 2/3 inches in 8 days.

Ksju [112]3 years ago

6 0

Answer: The required length by which the elephant grows in 8 days is $18\dfrac{2}{3}~\textup{inches}.$

Step-by-step explanation: Given that an elephant grows $2\dfrac{1}{3}$ inches a day.

We are to find the length by which it grow in 8 days.

We will be using the UNITARY method to solve the given problem.

In 1 day, the length by which the elephant grow is

$2\dfrac{1}{3}=\dfrac{7}{3}~\textup{inches}.$

Therefore, the length by which the elephant grow in 8 ways is given by

$\dfrac{7}{3}\times8=\dfrac{56}{3}=18\dfrac{2}{3}~\textup{inches}.$

Thus, the required length by which the elephant grows in 8 days is $18\dfrac{2}{3}~\textup{inches}.$

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coldgirl [10]

Answer:

C.I = 0.7608 ≤ p ≤ 0.8392

Step-by-step explanation:

Given that:

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= 5%

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The objective is to develop a 95% confidence interval estimate for the proportion of all Boston residents who voted for Obama.

The confidence internal can be computed as:

$=\hat p \pm Z_{\alpha/2} \sqrt{\dfrac{ p(1-p)}{n } }$

where;

$Z_{0.05/2}$ = $Z_{0.025}$ = 1.960

SO;

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$=0.8 \pm 1.960 \sqrt{\dfrac{ 0.8(0.2)}{400 } }$

$=0.8 \pm 1.960 \sqrt{\dfrac{ 0.16}{400 } }$

$=0.8 \pm 1.960 \sqrt{4 \times 10^{-4}}$

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$=0.8 \pm 0.0392$

= 0.8 - 0.0392 OR 0.8 + 0.0392

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Nutka1998 [239]

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