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3 years ago

209 is v divided by 255

Mathematics

1 answer:

stiv31 [10]3 years ago

3 0

Answer:

0.81

Step-by-step explanation:

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James has 16 balloons. 1/4 of his balloons are red. How many balloons does he have? 1/2 of his red balloons pop after ten minute

dybincka [34]

The answer is 2 because 1/4 of the balloons which are red would make 4 red balloons and half of 4 is 2.

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4 years ago

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Which expression is equivalent to (r^5/4

Mademuasel [1]

<u>Answer:</u>

<u>Step-by-step explanation:</u>

• Multiplying two numbers with same bases is the same as adding their powers:

∴ $(\frac{4^{\frac{5}{4} } \cdot 4^{\frac{1}{4} }}{4^{\frac{1}{2} }})^{\frac{1}{2} }$

⇒ $(\frac{4^{\frac{5}{4} } ^ + ^{\frac{1}{4} }}{4^{\frac{1}{2} }})^{\frac{1}{2} }$

⇒ $(\frac{4^{\frac{6}{4} }}{4^{\frac{1}{2} }})^{\frac{1}{2} }$

• Dividing two numbers with same bases is the same as subtracting their powers:

∴ $(\frac{4^{\frac{6}{4} }}{4^{\frac{1}{2} }})^{\frac{1}{2} }$

⇒ $(4^{{\frac{6}{4} - \frac{1}{2} }})^{\frac{1}{2} }$

⇒ $(4^{1})^{\frac{1}{2} }$

⇒ $4^{\frac{1}{2}$

• Raising anything to the power of $\frac{1}{2}$ is the same as square-rooting it:

∴ $4^{\frac{1}{2}$

⇒ $\sqrt{4}$

⇒ 2

3 0

2 years ago

3.3 million births per year. How many births per minute?

stellarik [79]

There could be more than 100 births per minute as long as it equals to 3.3 million

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3 years ago

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What number should be placed in the box to help complete the division calculation

notsponge [240]

Answer:

Step-by-step explanation:

12 X 15 is 180, which is closest to 187, we have to add a 5 in the space next to 71 and 180 under 187

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4 years ago

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An exit poll of 1000 randomly selected voters found that 515 favored measure A. a. Construct a 99% confidence interval for the s

never [62]

Answer:

Step-by-step explanation:

Given that an exit poll of 1000 randomly selected voters found that 515 favored measure A.

Sample proportion p = $\frac{515}{1000} =0.515$

$q=1-0.515 =0.485\\n =1000\\SE = \sqrt{\frac{pq}{n} } \\=0.158\\$

Margin of error 99% = 2.58*SE

= $2.58*0.0158\\=0.0408$

99% confidence interval = $(0.515-0.0408, 0.515+0.0408)\\= (0.474, 0.556)$

------------------------

$H_0: p =0.5\\H_a: p >0.5\\$

(Right tailed test)

STd error = $\sqrt{\frac{0.5*0.5}{1000} } \\=0.0158$

Test statistic Z = p diff/std error = $\frac{0.015}{0.0158} \\\\=0.9487$

p value = 0.1714

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3 years ago