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3 years ago

the area of a circle is 64π ft2. what is the circumference in feet? Express your answer in terms of π

Mathematics

1 answer:

hammer [34]3 years ago

6 0

Answer:

12π ft

Step-by-step explanation:

~Refer to the attachment for the solution. :)

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Find x in this trigonometry question

IRINA_888 [86]

$\tan 61=\dfrac{y}{10}\\
y=10\tan 61\\\\
\cos 55=\dfrac{z}{10 \tan 61}\\
z=10\tan 61\cos 55\\\\
\sin x=\dfrac{10\tan 61\cos 55}{12}\\
\sin x\approx\dfrac{10\cdot1.8\cdot0.57}{12}\\
\sin x\approx0.855\\
x\approx58.76^{\circ}$

8 0

3 years ago

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aleksley [76]

Answer: <

6.12 x 10^4 < 612,000

Step-by-step explanation:

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3 years ago

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aksik [14]

The answer to the question is C

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4 years ago

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Your dog is digging a huge hole in the backyard. On average he removes 32 cubic feet of

AleksAgata [21]

Answer:

The answer will be 96

Step-by-step explanation:

32×3=96

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3 years ago

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A simple random sample of 100 8th graders at a large suburban middle school indicated that 81% of them are involved with some ty

Sophie [7]

Answer:

The interval is $0.7187 < p < 2.421$

Step-by-step explanation:

From the question we are told that

The sample size is $n = 100$

The population proportion is $p = 0.81$

The confidence level is C = 98%

The level of significance is mathematically evaluated as

$\alpha = 100 -98$

$\alpha = 2%$ %

$\alpha = 0.02$

Here this level of significance represented the left and the right tail

The degree of freedom is evaluated as

$df = n-1$

substituting value

$df = 100 - 1$

$df = 99$

Since we require the critical value of one tail in order to evaluate the 98% confidence interval that estimates the proportion of them that are involved in an after school activity. we will divide the level of significance by 2

The critical value of $\frac{\alpha}{2}$ and the evaluated degree of freedom is