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3 years ago

8

Whats the area of a quarter-circle with diameter of 4 meters

2 answers:

KengaRu [80]3 years ago

7 0

Answer:

B, C, E

Trust ;)

kkurt [141]3 years ago

5 0

The answer is 3.14 m

The area (A) of the circle with radius r is: A = π · r²
The area of the quarter of the circle is: A1 = 1/4A = 1/4 · π · r²

We have:
A1 = ?
r = ?
π = 3.14
d = 4 m

A diameter d is the twice of the radius r: d = 2r.
Therefore, the radius is the half of the diameter: r = d/2
So, the area of the quarter circle would be:
A1 = 1/4 · π · r² = 1/4 · π · (d/2)² =1/4 · π · d²/2² = 1/4 · π · d²/4 = 1/16 · π · d²

A1 = 1/16 · π · d² = 1/16 · 3.14 · 4² = 1/16 · 3.14 · 16 = 3.14 m

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2x+3y=12 complete the missing value in the solution to the equation ( 8,)

Leto [7]

Answer:

Missing value is -4/3 and whole solution can be written as ( 8,-4/3)

Step-by-step explanation:

Given equation 2x+3y=12

solution ( 8,)

solution is form (x,y) hence in (8,) x is given as 8 while y is missing to find y

we will plug 8 as value of x in equation 2x+3y=12. From this equation we will find the missing value.

2x+3y=12

=> 2*8+3y=12

=> 16 + 3y = 12

=> 3y = 12-16= -4

=> y = -4/3

Thus, missing value is -4/3 and whole solution can be written as ( 8,-4/3)

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4 years ago

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3 years ago

Write an explicit formula for an,the Nth term of the sequence 4,12,36

Rudik [331]

Answer:

$3^{n}+3^{n-1}$

Step-by-step explanation:

Since the sequence is geometric (it multiplies the previous number each time). The nth term sequence would be $x^n + yn$

Because the sequence multiplies by 3 each time, The base number in that equation would be $3^n +yn$ .

So $3^n$ of the equation would be:
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Compare the 2 equations:
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The difference between the 2 equations is: 1, 3, 9 which itself is a geometric sequence so the nth term of this new equation is: $3^{n-1}$ .

Combine these 2 equations together and you get:

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2 years ago

A tile measures 10cm by 10cm. How many such tiles are required to cover a wall of size 4m and 2.5m?

irina [24]

Answer:

Step-by-step explanation:

[4m(2.5m)(100^2cm^2/m^2)]/10^2cm^2=1000 tiles

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3 years ago

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80 POINTS PLEASE ANSWER!!!!

enot [183]

Answer:

1.5 cm³

Step-by-step explanation:

Hey There!

so the first thing that we want to do is find the formula for volume of a rectangular prism

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just so you know

l=length

w=width

h=height

now we just plug in the dimensions and get

$v=1\frac{1}{2}1 \frac{1}{2} \frac{2}{3}$

if you plug this into a calculator you get that the volume of the prism is 1.5 cm

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3 years ago

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