1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
netineya [11]
2 years ago
8

PLS HELP!! GIVING BRAINLIEST TO FIRST CORRECT ANSWER!!+50 POINTS

Mathematics
1 answer:
Elena-2011 [213]2 years ago
3 0

Answer(s):

  • 154 in²
  • 3168/7 km²
  • 38.5 m²

Revising the area of a circle formula

We already know that the area of a circle is expressed as \pi r^{2}.

  • The "r" variable is known as the radius.
<h2><u>Solving each problem given:</u></h2><h3>Solving Problem 4:</h3>

We are given the radius of circle, which is 7 in. Let us substitute the radius in the formula. Once substituted, we can simplify the expression obtained to determine the area of the circle shown in the picture.

\implies \pi (7)^{2}

<u>Take π as 22/7</u>

\implies \huge\text{(}\dfrac{22}{7} \huge\text{)}(7)^{2}<em> </em>

\implies \huge\text{(}\dfrac{22}{7} \huge\text{)}(7)(7)

\implies (22)(7)

\implies 154 \ \text{in}^{2}

<h3>Solving Problem 5:</h3>

In this problem, we are given the diameter to be 24 kilometers. Since the radius of the circle is half the diameter, we can tell that the radius of the circle is 24/2 kilometers, which is 12 kilometers.

\implies \pi (12)^{2}

<u>Take π as 22/7</u>

\implies \huge\text{(}\dfrac{22}{7}\huge\text{)} (12)^{2}

\implies \huge\text{(}\dfrac{22}{7}\huge\text{)} (12)(12)

\implies \dfrac{3168}{7} \ \text{km}^{2}

<h3>Solving Problem 6:</h3>

We are given the radius of circle, which is 3.5 in. Let us substitute the radius in the formula. Once substituted, we can simplify the expression obtained to determine the area of the circle shown in the picture.

\implies \pi (3.5)^{2}

<u>Take π as 22/7</u>

\implies \huge\text{(}\dfrac{22}{7}\huge\text{)}  (3.5)^{2}

\implies \huge\text{(}\dfrac{22}{7}\huge\text{)}  (3.5)(3.5)

\implies \huge\text{(}\dfrac{22}{2}\huge\text{)} (3.5) = (11) (3.5)

\implies 38.5 \ \text{m}^{2}

Note: <em>The radius given in this problem was not clearly stated. If the radius I stated here, is incorrect, please notify me in the comments. Thanks!</em>

Learn more about area of circles: brainly.com/question/12414551

You might be interested in
Please solve, -7x+8=-4(x+1)​
omeli [17]

Answer: x=4

<u>Simplify both sides of the equation.</u>

<u></u>-7x+8=-4(x+1)\\-7x+8=(-4)(x)+(-4)(1)(Distribute)\\-7x+8=-4x+-4<u></u>

<u></u>

<u>Add 4x to both sides</u>

<u></u>-7x+8+4x=-4x-4+4x\\-3x+8=-4<u></u>

<u></u>

<u>Subtract 8 from both sides</u>

<u></u>-3x+8-8=-4-8\\-3x=-12

<u>Divide both sides by -3</u>

<u></u>-3x/-3=-12/-3\\x=4<u></u>

5 0
3 years ago
Read 2 more answers
Can someone help me :(
nikdorinn [45]

Answer:

A is the correct answer

.......................

8 0
3 years ago
Read 2 more answers
What is the sum, difference, product, and quotient of 7/12
True [87]

Answer:

7 plus 12 equals 19.

7 minus 12 equals -5.

7 times 12 equals 84.

7 divided by 12 equals 0,583...

7 0
3 years ago
Read 2 more answers
An urn contains three red balls and four blue balls. Draw two balls at random from the urn, without replacement. Compute the exp
mezya [45]

Step-by-step explanation:

in total we have 3+4 = 7 balls.

when we draw the first ball, the probability to draw a red ball is 3/7, and a blue ball 4/7.

when we draw the second ball, we have now only 6 balls in total.

the probabilty to draw a red back now depends also on the result of the first draw.

if the first ball was already red, then we have only a chance now of 2 out of 6.

if the first ball was blue, then we have now a chance of 3 out of 6.

so, the probably to draw at least 1 red ball in 2 draws is the probability of drawing one on the first draw plus the probability of drawing one on the second :

1 - probability to see 2 blue balls

1 - 4/7 × 3/6 = 1 - 12/42 = 30/42 = 0.714285714...

the expected number of red balls in 2 draws is

1 red in first red in first red in second

but not second and second but not first

1×(3/7 × 4/6) + 2×(3/7 × 2/6) + 1×(4/7 × 3/6) = 12/42 + 12/42 + 12/42 = 36/42 = 6/7 = 0.857142857 ≈ 0.8571

7 0
2 years ago
In an isosceles trapezoid, nonparallel sides are congruent--True or false
lakkis [162]

Answer:

TRUE  

Step-by-step explanation:

In an isosceles trapezoid, the base angles are equal and therefore the nonparallel sides are congruent.

The parallel sides are never congruent.

4 0
3 years ago
Read 2 more answers
Other questions:
  • which expression is equivalent to 100 n2 − 1? (10n)2 − (1)2 (10n2)2 − (1)2 (50n)2 − (1)2 (50n2)2 − (1)2
    11·2 answers
  • You are building a shed for growing plants and other vegetations. It has a sloped roof.
    11·1 answer
  • Find the range for the following set of data: 75, 55, 68, 74, 89, 100, 95, 71, 58, 111, 53, 97, 117, 103, 82, 80 a. 63 c. 81 b.
    6·1 answer
  • Evaluate the expression when x=-5.<br> x² +98-6
    8·2 answers
  • 8+7 = 7+8 what's the property
    12·2 answers
  • Please can you help me I don't understand
    5·1 answer
  • What is 3/16 as a decimal
    15·2 answers
  • At school 161 students play at least one sport.This is 70% of the number of the student at the school. How many suenos are at th
    10·1 answer
  • A soccer player is 30 feet from the goal line. He shoots the ball directly at the goal.
    15·1 answer
  • The function f(x) is graphed below . What is true about the graph on the interval from point b to point c ?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!