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3 years ago

The label on a 1 1/2 pound bag of wildflower seeds states that it will cover an area of

Mathematics

1 answer:

bixtya [17]3 years ago

5 0

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Plz Help .............

Rus_ich [418]

$363.9ft^{2}$

Step-by-step explanation:

$Area =\pi r^{2} -\frac{1}{3}\pi r^{2} +\frac{1}{2}r^{2}sin\alpha \\\\\\ = \frac{2}{3}\pi 12^{2} +\frac{1}{2}12^{2}sin120 =363.9ft^{2}$

5 0

3 years ago

Read 2 more answers

A professor at a university wants to estimate the average number of hours of sleep the students get during exam week. The profes

balandron [24]

Answer:

The sample size is $n = 2$

Step-by-step explanation:

From the question we are told that

The margin of error is E =4.266

The standard deviation is $\sigma = 2.539$

From the question we are told the confidence level is 99% , hence the level of significance is

$\alpha = (100 - 99 ) \%$

=> $\alpha = 0.01$

Generally from the normal distribution table the critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 2.58$

Generally the sample size is mathematically represented as

$n = [\frac{Z_{\frac{\alpha }{2} } * \sigma }{E} ] ^2$

=> $n = [\frac{2.58 * 2.539 }{4.266} ] ^2$

=> $n = 2$

6 0

3 years ago

Which phrase describes the variable expression 11 • X?

Anvisha [2.4K]

Answer:

B or C

Step-by-step explanation:

if its refering to the answer of 11 × X then the answer is C, but if its not the answer might be B.

6 0

2 years ago

How do you solve an equation by the square root property? <br> Ex: 7x^2=42

Dmitry_Shevchenko [17]

The answer is 3 at least thats what ive learned

3 0

3 years ago

Paula runs a stable. 20 horses currently board at the stable, and 8 of them are bay.

FrozenT [24]

Answer:

40% chance

Step-by-step explanation:

Take the number of horses total and divide the number of bay horses.

5 0

3 years ago