All categories

4 years ago

Please help I will give brainiest I need your help!!!!

Mathematics

1 answer:

katen-ka-za [31]4 years ago

6 0

Answer:

Step-by-step explanation:

∠OAB is 90 degrees, tangent and a radius met at 90 degree angle

∠OCB=90 degrees, tan and radius meet at 90 degrees angle

OB=12

find angle BOC:

triangle BOA is right angle triangle:

cos(AOB)=adj/hyp=7/12=54.33

angle B= 180-(90+54.33)=35.67

angle COB=54.33 equal to angle AOB

angle AOC=54.33+54.33=108.66

the sum of angles of circle =360

360-108.66= 251.34( exterior angle at the center AOC)

length of the arc= angle (251.34 degrees*7)

convert degrees to radians=4.386 (251.34/π)

length=r*angle in radian=4.386*7=30.71

( i hope this is the answer)

You might be interested in

Would appreciate some help first to answer gets brainliest

elixir [45]

The correct answer is B

3 0

3 years ago

A local coupon mailer charges $11 for each of the first three lines of an ad, and $5 for each additional line. What is the price

Tema [17]

: $55

:

Cost first 3 lines: $11 per line
Cost per additional line: $5

We are interested in 5-line ad, we place 3 lines or less, then we have to pay $11 per line in the ad.

Cost 5-lines = number of lines x cost per line

x = 5 x 11

55

3 0

3 years ago

Zach is filling his dog's bowl with water. is it reasonable to say that Zach will need about 4 gallons of water.

pshichka [43]

It's not reasonable to give him 4 gallons because that's way too much for a dog bowl.

6 0

3 years ago

Read 2 more answers

Does the point (-4, 2) lie inside or outside or on the circle x^2 + y^2 = 25?

d1i1m1o1n [39]

Given equation of the Circle is ,

$\sf\implies x^2 + y^2 = 25$

And we need to tell that whether the point (-4,2) lies inside or outside the circle. On converting the equation into Standard form and determinimg the centre of the circle as ,

$\sf\implies (x-0)^2 +( y-0)^2 = 5 ^2$

Here we can say that ,

• Radius = 5 units

• Centre = (0,0)

Finding distance between the two points :-

$\sf\implies Distance = \sqrt{ (0+4)^2+(2-0)^2} \\\\\sf\implies Distance = \sqrt{ 16 + 4 } \\\\\sf\implies Distance =\sqrt{20}\\\\\sf\implies\red{ Distance = 4.47 }$

Here we can see that the distance of point from centre is less than the radius.

Hence the point lies within the circle .

4 0

3 years ago

Read 2 more answers

The bells are adding a new room to their house. The room will be a cube with volume of 5,832 ft^3. They are going to put in hard

gtnhenbr [62]

1620 because 5832 is 18 to the 3rd power which means that because it is a cube 18 to the second power will be able to find the base which 324 ft^2, multiplying that by 5 dollar gets 1,620 dollars

4 0

3 years ago