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leonid [27]
3 years ago
9

To the nearest tenth, what is the area of a circle whose radius is 2.2 feet?

Mathematics
2 answers:
den301095 [7]3 years ago
7 0
A = πr² = 3.14 · 2.2² = 3.14 · 4.84 ≈ 15.2 ft²
Margarita [4]3 years ago
7 0
The answer is 15.2 squared...

Please mark as brainliest
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Find the slope of the line that passes through (40,3000) and (60, 4000).
iragen [17]

Answer:

m=50

General Formulas and Concepts:

<u>Pre-Alg</u>

  • Order of Operations: BPEMDAS

<u>Algebra I</u>

  • Slope Formula: m=\frac{y_2-y_1}{x_2-x_1}

Step-by-step explanation:

<u>Step 1: Define</u>

Point (40, 3000)

Point (60, 4000)

<u>Step 2: Find slope </u><em><u>m</u></em>

  1. Substitute:                    m=\frac{4000-3000}{60-40}
  2. Subtract:                       m=\frac{1000}{20}
  3. Divide:                          m=50
3 0
3 years ago
HELP QUICK<br> Remove grouping symbols and combine like terms.<br> 4a2 - 3[2b - 3b(b - 1)]
kvasek [131]
Answer:
4a^2 - 15b + 9b^2

Step by step explanation:
8 0
3 years ago
Read 2 more answers
Please answer this question now
borishaifa [10]

Answer:

70 degrees

Step-by-step explanation:

Measure of arc ABC is 128 degrees, so measure of arc BC is 128-90 = 38 degrees.

Meausure of arc BCD is 102 + 38 = 140 degrees, so measure of angle A is 140/2 = 70 degrees

7 0
3 years ago
Read 2 more answers
From an aeroplane vertically above a straight horizontal plane, the angles of depression of two consecutive kilometres stones on
Airida [17]
You have to build the triangles.

They are such that:
h is the common height
x is the horizontal distance from the plane to one stone
Beta is the angle between x and the  hypotenuse

Then in this triangle: tan(beta) = h / x ......(1)

1 - x is the horizontal distance from the plane to the other stone
alfa is the angle between 1 - x  and h

Then, in this triangle: tan (alfa) = h / [1 -x ] ...... (2)

from (1) , x = h / tan(beta)

Substitute this value in (2)

tan(alfa) = h / { [ 1 - h / tan(beta)] } =>

{ [ 1 - h / tan(beta) ] } tan(alfa) = h

[tan(beta) - h] tan(alfa) = h*tan(beta)

tan(beta)tan(alfa) - htan(alfa) = htan(beta)

h [tan(alfa) + tan(beta) ] = tan(beta) tan (alfa)

h = tan(beta)*tan(alfa) / (t an(alfa)  + tan(beta) )





4 0
3 years ago
3 to the 4th power + 2.5
Marina CMI [18]

Answer:

83.5

Step-by-step explanation:

3^4+2.5\\81+2.5\\83.5\\

7 0
2 years ago
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