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3 years ago

How do I simplify this?

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Mathematics

1 answer:

ivanzaharov [21]3 years ago

8 0

Answer: look at the picture

Step-by-step explanation: Hope this help

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Randy walks his dog each morning he walks 7/12 of a mile in 7 minutes how many miles does he walk in 1 minute

Andrej [43]

Answer:1/12

Step-by-step explanation:just divide 7/12 by 7 to get the per minute

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3 years ago

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Farmer Bob is trying to figure out how much space he has for his garden. If the sides of the garden are 10 ft and 50 ft, what is

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3 years ago

IMPORTANT PLEASE I NEED NOW:Find the area of each face of the cube whose volume is 729 cm

vivado [14]

Answer:

Step-by-step explanation:

square root of 729= 9

9×9=81

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3 years ago

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What is the value of u and v?

Novay_Z [31]

Answer and Explanation:

Since this is an isosceles right triangle, you can use the ratio of side lengths specific to this type of triangle where both legs are the hypotenuse over root 2:

u = v = 164√2 / √2 = 164

so:

u = 164

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3 0

2 years ago

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A researcher wishes to estimate, with 99% confidence, the population proportion of adults who think the president of their co

scoray [572]

Answer:

a. n=4148

b. n=3909

c. The sample size is smaller if a known proportion from prior study is used. The difference in sample sizes is 239

Step-by-step explanation:

a. For sample where no preliminary estimate is given, the minimum sample size is calculated using the formula:

$n=p(1-p)(\frac{z}{ME})^2$

Where:

$ME=$ Margin of error
$p=$ is the assumed proportion

#Let p=0.5, substitute in the formula to solve for n:

$n=0.5(1-0.5)\times (2.576/0.02)^2\\\\=4147.36\approx 4148$

Hence, the minimum sample size is 4148

b. If given a preliminary estimate p=0.38, we use the same formula but substitute p with the given value:

$n=p(1-p)(z/ME)^2\\\\=0.38(1-0.38)(2.576/0.02)^2\\\\=3908.47\approx3909$

Hence, the minimum sample size is 3909

c. Comparing the sample sizes from a and b:

$n_{0.5}>n_{0.38}\\\\n_{0.5}-n_{0.38}=4148-3909=239$

Hence, the actual sample size is smaller for a known proportion from prior a prior study.

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3 years ago