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Svetradugi [14.3K]
3 years ago
9

The area of a circle is 360.9. Find the radius of the circle. (Round to 2 decimal places.)

Mathematics
1 answer:
Ksju [112]3 years ago
4 0
The radius of a circle is a=pi r^2.
so 360.9=3.14r^2, so that's around 114.94=r^2
r=10.72
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In ΔOPQ, o = 9.2 cm, p = 2.4 cm and ∠Q=37°. Find the length of q, to the nearest 10th of a centimeter.
storchak [24]

The length of q, to the nearest 10th of a centimeter is 7.6 cm.

Given in question,

In ΔOPQ,

o = 9.2 cm

p = 2.4 cm

∠Q = 37°

Cosine formula ⇒ cos θ = \frac{o^{2}+p^{2}-q^{2}  }{2op}

Putting the values in equation,

       cos 37 = \frac{(9.2)^{2}+(2.4)^{2}-q^{2}  }{2*9.2*2.4}

         0.799 = \frac{84.64 + 5.76-q^{2} }{44.16}

0.799*44.16 = 90.4 - q^{2}

         32.28 = 90.4 - q^{2}

                q^{2} = 90.4 - 32.28

                q^{2} = 58.12

                 q = \sqrt{58.12}

                 q = 7.63

q = 7.6 cm (to nearest 10th)

Hence, length of q is 7.6 cm.

Learn more about length on:

brainly.com/question/8552546

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1 year ago
If rent to go charges you $30 for 300 miles what is the unit rate per 1 mile
lesantik [10]

Answer:

$10

Step-by-step explanation:

300 divided by 30 is 10

3 0
3 years ago
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What is 317,291 rounded to the nearest ten thousand? I'm very confused, ( Don't judge me because I am just in fourth grade and I
OverLord2011 [107]
It would be need to be 31729 because one through four makes it stay the same 5 through 9 memes it go up one
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Suppose a simple random sample of size nequals49 is obtained from a population with mu equals 78 and sigma equals 28.
VLD [36.1K]

Answer:

0.0735,0.0179,0.7026

Step-by-step explanation:

Given that a simple random sample of size nequals 49 is obtained from a population with mu equals 78 and sigma equals 28.

Sample size = 49

Population mean = 78

Population std deviation = 28

Std error of sample mean = \frac{\sigma}{\sqrt{n} } \\=4

a) \bar x: N(78, 4)

b) P(\bar x >83.8)\\=0.0735

(by converting to Z and finding value from Z table)

c) P (x overbar less than or equals 69.6 )​

=P(\bar x \leq 69.6)\\=0.0179

d) P (75.8 less than x overbar less than 88 )

=P(75.8

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3 years ago
Who ever can answer question 1 2 and 3 will get brainly
schepotkina [342]

Answer:

1.49 1/2

2.65

3.20

Step-by-step explanation:

I hope you have a good day

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