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3 years ago

-2 1/4 divided by (-1 1/2)

Mathematics

2 answers:

Gnoma [55]3 years ago

6 0

Answer:

1.5

Step-by-step explanation:

lisabon 2012 [21]3 years ago

3 0

Answer:

1 1/2

Step-by-step explanation:

-2 1/4 = $-\frac{(2*4)+1}{4}= -\frac{9}{4}$

-1 1/2 = $-\frac{(1*2)+1}{2}=-\frac{3}{2}$

-2 1/4 ÷ -1 1/2 = $-\frac{9}{4} * -\frac{2}{3}$

= $\frac{3}{2}$

= 1 1/2

Use KCF method

Keep the first number.

Change division to multiplication

Flip the second number

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What is the approximate volume of a cone with a radius of 15 cm and a height of 4 cm? Round your answer to the nearest hundredth

vichka [17]

Answer:

Volume of a cone $=942.86cm^3$

Step-by-step explanation:

Given that the radius of a cone is 15cm and its height is 4cm

That is r=15cm and h=4cm

To find the volume of a cone :

volume of a cone $=\frac{\pi r^2h}{3}$ cubic units

Now substitute the values in the formula we get

volume of a cone $=\frac{(\frac{22}{7}) (15)^2(4)}{3}$

$=\frac{(\frac{22}{7}) (225)(4)}{3}$

$=\frac{19800}{21}$

$=942.857$

Now round to nearest hundredth

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3 years ago

Use the sample data and confidence level to construct the confidence interval estimate of the population proportion p. n equals

Alekssandra [29.7K]

Answer:

(0.767,0.833)

Step-by-step explanation:

The 95% confidence interval for population proportion p can be computed as

$p-z_{\frac{\alpha }{2} } \sqrt{\frac{pq}{n} }$

The z-value associated with 95% confidence level is 1.96.

whereas p=x/n

We are given that x=440 and n=550.

p=440/550=0.8

$0.8-1.96\sqrt{\frac{0.8(0.2)}{550} }$

$0.8-1.96\sqrt{\frac{0.16}{550} }$

$0.8-1.96\sqrt{0.00029 }$

$0.8-1.96(0.01706)$

$0.8-0.03343$

$0.76657$

Thus, the required confidence interval is

0.767<P<0.833 (rounded to 3 decimal places)

Hence, we are 95% confident that our true population proportion will lie in the interval (0.767,0.833)

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2 years ago

The legs of a right triangle are 10 cm and 24 cm. What is the length of the hypotenuse?

n200080 [17]

To determine the length of the hypotenuse, apply Pythagorean theorem.

A^2 + B^2 = C^2
(10)^2 + (24)^2 = C^2
100 + 576 = C^2
676 = C^2
C = 26 cm.

The hypotenuse is 26 cm.

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3 years ago

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lisabon 2012 [21]

Answer:

nose mate

Step-by-step explanation:

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2 years ago

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vovangra [49]

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