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Natali5045456 [20]
1 year ago
9

Find BC. plssss helpp!!!

Mathematics
1 answer:
Lelechka [254]1 year ago
7 0

Answer:

<em>BC is 22.5 mi</em>

Step-by-step explanation:

Using the pythagorean theorem formula. <em> </em><em>c</em><em>²</em><em> </em><em>=</em><em> </em><em>a</em><em>²</em><em> </em><em>+</em><em> </em><em>b</em><em>²</em>

<em>BC²</em><em> </em><em>=</em><em> </em><em>AB²</em><em> </em><em>+</em><em> </em><em>AC</em><em>²</em>

<em>BC²</em><em> </em><em>=</em><em> </em><em>1</em><em>9</em><em>²</em><em> </em><em>+</em><em> </em><em>1</em><em>2</em><em>²</em>

<em>BC²</em><em> </em><em>=</em><em> </em><em>3</em><em>6</em><em>1</em><em> </em><em>+</em><em> </em><em>1</em><em>4</em><em>4</em>

<em>BC²</em><em> </em><em>=</em><em> </em><em>5</em><em>0</em><em>5</em>

<em>√</em><em>B</em><em>C</em><em>²</em><em> </em><em>=</em><em> </em><em>√</em><em>5</em><em>0</em><em>5</em>

<em>BC</em><em> </em><em>=</em><em> </em><em>2</em><em>2</em><em>.</em><em>5</em>

<em>Therefore</em><em> </em><em>BC </em><em>is </em><em>2</em><em>2</em><em>.</em><em>5</em><em> </em><em>mi</em>

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Step-by-step explanation:

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A store sells rope by the meter. The equation p=0.8L represents the price p(in dollars) of a piece of nylon rope that is L meter
Margaret [11]

Answer:

1. $0.80 or 80 cents

2. 1.25 meters

Step-by-step explanation:

The equation p=0.8L represents the price p (in dollars) of a piece of nylon rope that is L meters long.

1. To find how much the nylon costs per meter, take L = 1 (this means you are calculating the price of a piece of nylon rope that is 1 meter long):

L=1,\\ \\p=\$0.8\cdot 1=\$0.80

2. To find how long a piece of nylon rope that costs $1.00 is, substitute into the equation p = 1:

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3 years ago
A geometric series has second term 375 and fifth term 81 . find the sum to infinity of series .
Eduardwww [97]

Answer:  \bold{S_{\infty}=\dfrac{3125}{2}=1562.5}

<u>Step-by-step explanation:</u>

  a₁,  375,  a₃,   a₄,  81

First, let's find the ratio (r). There are three multiple from 375 to 81.

375r^3=81\\\\r^3=\dfrac{81}{375}\\\\\\r^3=\dfrac{27}{125}\qquad \leftarrow simplied\\\\\\\sqrt[3]{r^3} =\sqrt[3]{\dfrac{27}{125}}\\ \\\\r=\dfrac{3}{5}

Next, let's find a₁

a_1\bigg(\dfrac{3}{5}\bigg)=375\\\\\\a_1=375\bigg(\dfrac{5}{3}\bigg)\\\\\\a_1=125(5)\\\\\\a_1=625

Lastly, Use the Infinite Geometric Sum Formula to find the sum:

S_{\infty}=\dfrac{a_1}{1-r}\\\\\\.\quad =\dfrac{625}{1-\frac{3}{5}}\\\\\\.\quad =\dfrac{625}{\frac{2}{5}}\\\\\\.\quad = \dfrac{625(5)}{2}\\\\\\.\quad = \large\boxed{\dfrac{3125}{2}}

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3 years ago
The circumference of a redwood tree trunk is 16π ft, and it is 100 ft tall. What is the approximate volume of the redwood tree t
GarryVolchara [31]

Answer:

volume of  redwood tree is 6400 π ft^3(option 4)

Step-by-step explanation:

concept =

volume of cylinder = πr^2l

where r is the radius and l is the length of cylinder

circumference of cylinder = 2πr

_____________________________________

shape of  redwood tree can be taken as cylindrical

given

circumference of a redwood tree trunk is 16π ft

2πr = 16π

=> r = 16π/2π = 8

Thus, radius is 8 feet

Therefore volume of  redwood tree = πr^2l = π8^2*100 = π*64*100

volume of  redwood tree =6400 π ft^3

7 0
3 years ago
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