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
Scrat [10]
3 years ago
11

Please help me with question no.1 and 2. chapter ; circles​

Mathematics
1 answer:
mars1129 [50]3 years ago
4 0
1. Find the perimeter of the square then the circumference of the circle then subtract the circle from the square.
Area of square=length of side squared=9.8^2=96.04.
Area of circle=(pi*radius)^2=((22/7)*(9.8/2))^2

2. Area of circle=pi*r squared
38.5=((22/7)*r)^2
Solve for r
Square root of 38.5/(22/7))=r
calculate area using above formula
You might be interested in
The area of a rectangle is 60 cm2 If the width of the
aleksklad [387]

The length of the rectangle is 10 cm and perimeter of the rectangle is 32 cm.

Step-by-step explanation:

Given,

The area of rectangle = 60 sq cm

Width (b) of the rectangle = 6 cm

To find the length and perimeter of the rectangle.

Formula

The area of the rectangle = l×b

The perimeter of the rectangle = 2(l+b)

According to the problem,

l×b = 60

or, l×6 = 60

or, l = 60÷6 = 10

Length (l) = 10 cm

Perimeter = 2×(10+6) cm = 32 cm

6 0
3 years ago
"Define a variable write an inequality and solve each problem".A number +1 is greater than -5 less than three.
Brrunno [24]

Answer:  -5 < x + 1 < 3

Step-by-step explanation:

Let x be the number.

-5 < x + 1 < 3

4 0
3 years ago
Find the obtuse angle between the following pair of straight lines.
ioda

Given:

y=-2

y=\sqrt{3}x-1

To find:

The obtuse angle between the given pair of straight lines.

Solution:

The slope intercept form of a line is

y=mx+b     ...(i)

where, m is slope and b is y-intercept.

The given equations are

y=0x-2

y=\sqrt{3}x-1

On comparing these equations with (i), we get

m_1=0

m_2=\sqrt{3}

Angle between two lines whose slopes are m_1\text{ and }m_2 is

\tan \theta=\left|\dfrac{m_2-m_1}{1+m_1m_2}\right|

Putting m_1=0 and m_2=\sqrt{3}, we get

\tan \theta=\left|\dfrac{\sqrt{3}-0}{1+(0)(\sqrt{3})}\right|

\tan \theta=\left|\dfrac{\sqrt{3}}{1+0}\right|

\tan \theta=\pm \sqrt{3}

Now,

\tan \theta= \sqrt{3} and \tan \theta=-\sqrt{3}

\tan \theta= \tan 60^\circ and \tan \theta=\tan (180^\circ-60^\circ)

\theta= 60^\circ and \theta=120^\circ

120>90, so it is an obtuse angle and 60, so it is an acute angle.

Therefore, the obtuse angle between the given pair of straight lines is 120°.

6 0
3 years ago
Simplify your answer and write it as a proper fraction,improper fraction,or interger
devlian [24]

Answer:

2

Step-by-step explanation:

Take any 2 points on the graph,

(50, 10) & (90, 90)

Use the slope formula:

\frac{y2-y1}{x2-x1}

= (90-10)/(90-50)

= (80)/(40)

= 2

Hence, the slope is 2.

<em>Feel free to mark this as brainliest! :D</em>

4 0
3 years ago
A car traveling at 32 m/s starts to decelerate steadily. It comes to a complete stop in 14 seconds. What is its acceleration?
valentina_108 [34]
We have:

Initial velocity (u) = 32 m/s
Final velocity (v) = 0 m/s ⇒ The value is zero because the car comes to stationary position when it stops
Time = 14 seconds

We can use one of the constant acceleration equation:
v=u+at where a is the acceleration

0=32+14a
32=-14a
a=- \frac{32}{14}=-2.3m/s^{-2}

The acceleration is 2.3 m/s⁻² and the negative sign shows deceleration
3 0
3 years ago
Read 2 more answers
Other questions:
  • Consider the infinite geometric series ∑∞n=1−4(13)n−1
    15·2 answers
  • Answer ASAP!!!!!!!!!! Please
    13·1 answer
  • Three students used factoring to solve a quadratic equation.
    9·1 answer
  • Find the following probabilities for the standard normal random variable z: a. P(−1.36 ≤ z ≤ 1.38)= ________ b. P(−2.27 ≤ z ≤ 1.
    9·2 answers
  • one month, isaiah worked 13 hours less than 3 times ryan, and Mauricio worked 7 hours more than ryan. together they worked 74 ho
    14·1 answer
  • What is the image point of (-7,-2) after a translation left 5 units and down 4​
    8·1 answer
  • Steffi is painting her house. She has calculated she needs 40 litres of paint in total. She has decided to mix pink paint. She w
    15·1 answer
  • Answer please !!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!
    12·2 answers
  • When it comes to reimbursement packages, company A offers $175 plus
    13·1 answer
  • The town of Butler received 6 more inches of snow than the town of Chicora. Let c represent the amount of snow in Chicora. Which
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!