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guajiro [1.7K]
3 years ago
8

Please help!

Mathematics
1 answer:
NeX [460]3 years ago
3 0
The area of each base = 1/2 * 6 * sqrt(6^2 - 3^2)
                                    =  3 * sqrt 27
                                    =  9 sqrt3

Total surface  area = 3 * 6*10 + 2*9 sqrt3
                             =  180 + 18sqrt3
                             =  211.2 ins^2   to nearest tenth.
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What is the coordinate of the circumference of the circle ?
vlabodo [156]

Answer:

(\frac{1}{2}, \frac{-1}{2}) is the right option.

Step-by-step explanation:

Let us consider the triangle ΔVUW.

The given figure shows that the angle at vertex V is 90°. So, it is a right triangle. So, the side UW will be the hypotenuse of the right triangle ΔVUW.

If we draw perpendicular bisectors of the three sides of this right triangle, the hypotenuse UW will have a midpoint at which these perpendicular bisectors would meet. This midpoint on hypotenuse UW would be the circumcenter of a this right angle triangle ΔVUW.

If we circumscribe a circle around this right triangle, this triangle will have circumcenter, which would also become the center of that circle.

This hypotenuse UW could be also treated as diameter of the circle, as the center of circumscribed center would lie on hypotenuse UW.

The coordinates of U is (-3 ,2) and the coordinates of W is (4,-3).

Midpoint of UW could be determined by this formula:

(\frac{x_{1} + x_{2}}{2},\frac{y_{1} + y_{2}}{2})

So,

Midpoint of UW = (\frac{-3 + 4}{2},\frac{2 + (-3)}{2})

Midpoint of UW = (\frac{1}{2},\frac{-1}{2})

So, the coordinates of circumcenter will be: (\frac{1}{2}, \frac{-1}{2})

As we know that If we circumscribe a circle around this right triangle, this triangle will have circumcenter, which would also become the center of that circle.

Hence,

The coordinates of circumcenter will also be the coordinate of circumference of the circle which would be (\frac{1}{2}, \frac{-1}{2}).

So, (\frac{1}{2}, \frac{-1}{2}) is the right option.

Keywords: circumcenter, triangle, circumference, perpendicular bisector

Learn More about circumcenter of triangle from brainly.com/question/7098737

#learnwithBrainly

8 0
3 years ago
Suppose you deposit $2000 in a bank account that has a doubling time of 19 years. To the nearest $100, what will your balance be
blondinia [14]

The expression for the balance (b) in terms of the number of years (t) can be written as

... b = 2000·2^(t/19) . . . . . . the amount grows exponentially, and is is doubled when t=19

Then for t=5, the balance is

... b = 2000·2^(5/19) ≈ 2400

The best choice is ...

... A. $2400

5 0
3 years ago
Read 2 more answers
Do them all please please
goblinko [34]

1) 9 + x

2) 14 - p

3) 7 - p

4) 9 * n

5) 32 / y

4 0
3 years ago
ASAP what is the value of k?<br> -3(k+7) - 5k+4=23
Maru [420]

Answer:

k=−5

Step-by-step explanation:

−3(k+7)−5k+4=23

(−3)(k)+(−3)(7)+−5k+4=23(Distribute)

−3k+−21+−5k+4=23

(−3k+−5k)+(−21+4)=23(Combine Like Terms)

−8k+−17=23

−8k−17=23

Step 2: Add 17 to both sides.

−8k−17+17=23+17

−8k=40

Step 3: Divide both sides by -8.

−8k

−8

=

40

−8

k=−5

Answer:

k=−5

 

6 0
3 years ago
Read 2 more answers
What is the Distributive property for 63÷3
mariarad [96]
63/3 = (60 +3)/3 = 60/3 + 3/3 = 20 + 1 = 21
7 0
3 years ago
Read 2 more answers
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