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3 years ago

10

If the diameter of a circle is 12 cm, what is the area to the nearest tenth.

1 answer:

atroni [7]3 years ago

6 0

Answer:

A≈113.1cm²

Step-by-step explanation:

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3.7 as a mixed fraction<br>let x =<br>10x =<br>9x =<br>x =<br><br>So 3.7 repeating is equal to...

NNADVOKAT [17]

Answer:

<h2>37/9</h2>

Step-by-step explanation:

<h3>we have</h3>

<h3>3.77777... :- is a repeating decimal</h3>

<h3>Let</h3>

<h3>x = 3.7...</h3>

<h3>so</h3>

<h3>10x =37.7...</h3>

<h3>10x - x = 37.7... -3.7...</h3>

<h3>9x=34</h3>

<h3>x= 34/9</h3>

<h3>convert to mixed number</h3>

<h3>34/9=(27/9)+(7/9)=3+(7/9) =37/9</h3>

<h3> I hope this may help you.</h3>

7 0

3 years ago

Will give brainliest and add more points to your acc if good awnser Please help ASAP

joja [24]

Hailey's mixing two different coffee blends. Represent them by x and y (in pounds). Then x + y = 5 lb, and x = 5 - y.How much puree Sum. beans are we talking about here?
0.20x +0.80y = 0.60(5 lb) Mult all 3 terms by 100 to get rid of factions:
20x + 80 y = 300. Substitute 5-y for x:
20(5-y) + 80y = 300 => 100-20y + 80y = 300 => 60y = 200, so y = 20/6 or 10/3 lb den x = 5-10/3, or x =5/3 lb
Use 5/3 lb of the first blend and 10/3 lb of the second blend to come up with 5 lb of a 60% blend.

7 0

3 years ago

Could someone please explain this problem to me?

disa [49]

Answer:

8/3

Step-by-step explanation:

Because all 4 angles are congruent, the sides are proportional.

the scale factor is 5/30 = 1/6.

meaning x = 16(1/6)=8/3.

7 0

2 years ago

When driving at night, you should dim your headlights when:

Tatiana [17]

Answer:

Meeting or following another vehicle

Step-by-step explanation:

5 0

2 years ago

A new medical test has been designed to detect the presence of the mysterious Brainlesserian disease. Among those who have the d

astra-53 [7]

Answer:

Step-by-step explanation:

The persons who have diseases = 19%

The persons who do not have diseases = 81%

Probability for the test showing positive = Prob of actual disease and shows positive + Prob of no disease but test shows wrong

= $0.7*0.19+0.04*0.81\\=0.133+0.0324\\=0.1654$

Prob that the person actually has the disease given that the test administered to an individual is positive= $\frac{0.133}{0.1654} \\=0.0804$

30) A B C total

2x 7x x 10x

P(A) = 0.2, P(B) = 0.7, P(C) = 0.1

Let D be the event that the product is defective

P(D/A) = 0.032, P(D/B) = 0.034 and P(D/C) = 0.056

Required probability =P(C/D)

= $\frac{P(D/C) P(C)}{P(D/A) P(a)+P(D/B) P(B)+P(D/C) P(C)}$

by using Bayes theorem for conditional probability

= $\frac{0.1*0.056}{0.2*0.032+0.7*0.034+0.1*0.056} \\=\frac{0.0056}{0.0064+0.0238+0.0056} \\\\=0.156425$

32) 7 digit phone numbers with repitition including 0 will be

= $10^7$

Numbers which have atleast one 7 = total number - numbers which do not have a single 7

= $10^7 -9^7$

the probability that a 7-digit phone number contains at least one 7

= $\frac{10^7-9^7}{10^7}$

3 0

3 years ago