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3 years ago

Can someone please answer this for me? Find the measure of side a. I will give brainliest answer!

Mathematics

1 answer:

Vikentia [17]3 years ago

6 0

Answer:

6 m

Step-by-step explanation:

The sine of an angle is the ratio between the opposite side of the angle and the hypotenuse.

Hence, sin 30° = $\frac{a}{c}$

= $\frac{a}{12}$

a = 12sin30°

a = <u>6m</u>

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5. The cost of a notebook increased from $4.30 to $4.58, what is the percent increase?

KonstantinChe [14]

The answer is 6.5
Explanation : 1. Find out the increase number by subtracting 4.58 - 4.30 = 0.28 or 6.51%
2. Divide the increase number 0.28 by 4.30 and multiple by 100 which gives you 6.51162791 .
3. Get rid of all the numbers behind 5 and you can’t round it because 1 is too small. Which then gives you the answer 6.5 :) <3

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2 years ago

Is life really worth it

taurus [48]

Answer:

life is a precious gift of GOD like see these days conditions too much people are dying life is our test it is worth whoever we wonder we are not birds,stones,mountains,trees they are also surviving and we are too we have not to survive we have to live our life there must be a difference between humans and animals i know life is brutal,tough and hard than why is it tough brutal and hard because it is a test a common life also passes and a man who serves hummanity his life also passes but a man serving hummanity is always remembered

"your life is your message to the world make it inspiring"

life is worth and too much previous

to die is easier than to life we have to live because we love challanges

Step-by-step explanation:

i hope this will help you :)

7 0

3 years ago

Read 2 more answers

A circle P is circumscribed about a regular hexagon ABCDEF

Leni [432]

Answer: True

Explanation:

Let point G be the center of both the hexagon and the circle.

The measure of arc AB is the same as central angle AGB, both of which are 360/6 = 60 degrees. This applies to the other arc measures as well. The full 360 degree circle is split up into 6 equal pieces, each piece being 60 degrees.

5 0

3 years ago

certain virus infects one in every 300 people. A test used to detect the virus in a person is positive 80% of the time if the pe

Alekssandra [29.7K]

Answer:

The probability that a person has the virus given that they have tested positive is P(A|B)=0.032.

The probability that a person does not have the virus given that they have tested negative is P(A'|B')=0.999.

Step-by-step explanation:

a) The probability of B: "the person tests positive" is the sum of:

- The probability that a person has the virus and the test is positive.

$P(A) \cdot P(B|A)$

- The probability that a person don't have the virus but the test is positive.

$P(not \,A) \cdot P(B|not\,A)$

Then, the probability of B: "the person tests positive" is

$P(A|B)=\frac{P(B|A)}{P(B)}=\frac{P(A)\cdot P(B|A)}{P(A)\cdot P(B|A)+P(A')\cdot P(B|A')}$

We have

$P(A)=1/300=0.0033\\\\P(A')=1-P(A)=0.9967\\\\P(B|A)=0.8\\\\P(B|A')=0.08$

Then

$P(A|B)=\frac{P(A)\cdot P(B|A)}{P(A)\cdot P(B|A)+P(A')\cdot P(B|A')}\\\\P(A|B)=\frac{0.0033*0.8}{0.0033*0.8+0.9967*0.08}= \frac{0.00264}{0.00264+0.07974}=\frac{0.00264}{0.08238}= 0.032$

The probability that a person has the virus given that they have tested positive is P(A|B)=0.032.

b) The probability P(A'|B') is

$P(A'|B')=\frac{P(B'|A')\cdot P(A')}{P(B'|A')\cdot P(A')+P(B'|A)\cdot P(A)}$

We have

$P(A)=0.0033\\\\P(A')=1-P(A)=0.9967\\\\P(B'|A)=1-0.8=0.2\\\\P(B'|A')=1-0.08=0.92$

Then

$P(A'|B')=\frac{P(B'|A')\cdot P(A')}{P(B'|A')\cdot P(A')+P(B'|A)\cdot P(A)}=\frac{0.92*0.9967}{0.92*0.9967+0.2*0.0033}= \frac{0.917}{0.917+0.00066}= 0.999$

The probability that a person does not have the virus given that they have tested negative is P(A'|B')=0.999.

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3 years ago

Taylor wants to buy a bag of chips for all of her classmates. If each bag of chips costs

Montano1993 [528]

Answer:

B) $16.25

Step-by-step explanation:

$1.25 x 13=$16.25

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3 years ago