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Anvisha [2.4K]
2 years ago
15

Find the area of the circle. Round your answer to the nearest hundredth.

Mathematics
2 answers:
Gennadij [26K]2 years ago
7 0

Answer:

2800

Step-by-step explanation:

Formulary for area of a circle is

Area = π × r2, where 'r' is the radius.

where π = 3.142

Therefore; 3.142 x (3)^2

3.142 x 9=

28.278= 2800

Shkiper50 [21]2 years ago
7 0
256 I think!!!!!
……………….
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Someone please help. I don’t understand these
WITCHER [35]

Answer: very too bad for you buddy study nexts time



Step-by-step explanation:


3 0
3 years ago
Given: ∠AOC, ∠BOC - complementary angles
34kurt

Answer:

  • 30
  • COB . . . . or . . . . BOC

Step-by-step explanation:

The reason given on the line of interest is "substitution," so the problem boils down to determining what was substituted for what. The previous statement says ...

  AOC + COB = 90

and the first part of the statement we're to complete has BOC + ___.

We see from the given statements that m∠AOC = m∠BOC + 30°, so it appears that is the substitution that has been made: AOC has been replaced by BOC + 30.

This means the first blank is filled with 30.

__

The second part of the previous statement is ...

  AOC + COB = 90

so we believe this (COB) should go in the second blank.

__

Then the line of interest would read ...

  BOC + 30 + COB = 90

_____

<em>Comment on the problem</em>

There is a curious mix of notations here. Usually, (as in the beginning of this problem) we refer to the measure of an angle using "m∠" in front of the angle designator, and we use a degree symbol to indicate the units of that measure. Part-way through the problem statement written here, those notations were dropped, and we're to assume they are intended. IMO, this is a poor way to demonstrate careful problem solving.

The substitution given for AOC is BOC+30, but the line into which that is substituted has AOC +COB = 90. This means the equation after substitution is ...

  BOC +30 +COB = 90

Since BOC and COB are the same angle, we can sort of fudge the "algebra" to get to  BOC=30, but if the problem were more carefully written, the angle would be referred to by consistent nomenclature:

  m∠AOC + m∠BOC = 90° . . . . . . . . . preferred angle designations

  (m∠BOC + 30°) + m∠BOC = 90° . . . . substitution for m∠AOC

  2(m∠BOC) = 60° . . . . . . algebra (subtract 30°, collect terms)

  m∠BOC = 30° . . . . . . . . algebra (divide by 2)

3 0
3 years ago
What is the absolute value of -7.5?
Artemon [7]

Answer:

3

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
8n - (2n+11 - 54)<br>simplify
Serjik [45]

Answer:

8n - (2n + 11 - 54) =

Step-by-step explanation:

6n + 43, I used a calculator !

5 0
3 years ago
What is the quotient of 8,595 ÷ 24?
brilliants [131]

its 3 hope this helpssss

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