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
Pachacha [2.7K]
2 years ago
11

The diameter of a circular placemat is 42 centimeters. What is the approximate area of the circular placemat

Mathematics
1 answer:
Inga [223]2 years ago
4 0

<em><u>area  \: of \: a \: circle \: or \: circular \: object \:  = \pir^{2}  \\  \:</u></em>

Answer:

1386cm^2.

Step-by-step explanation:

Radius of a circle = diameter / 2

= 42cm /2

= 21cm.

Area = (3.142 *21*21)cm^2

= 1386cm^2

To convert into metres:

=1386/100

=13.86m^2

You might be interested in
Write a quadratic equation with -4 and 3/2 as it’s roots. Write the equation in the form ax^2 + bx + c = 0, where a, b, and c ar
jonny [76]

9514 1404 393

Answer:

  2x² +5x -12 = 0

Step-by-step explanation:

When p and q are roots of a quadratic, its factored form can be written as ...

  (x -p)(x -q) = 0

Here, the roots are given as -4 and 3/2, so the factored form would be ...

  (x -(-4))(x -(3/2) = 0

Multiplying by 2 gives us ...

  (x +4)(2x -3) = 0

Expanding the product, we find the desired quadratic is ...

  2x² +5x -12 = 0

5 0
3 years ago
How many 1/8-pound patties can Mrs. Drake make from 7/8 of a pound of a hamburger?
GenaCL600 [577]
Mrs.Drake can make 7 1/8-pound patties.
5 0
3 years ago
Dorothy is using fabric to cover a photo album the width of the fabric is 5/8 of a yard the area of the fabric is 5/16 square ya
saul85 [17]

For this case we assume that the photo album is rectangular in shape and therefore the fabric too. By definition, the area of a rectangle is given by:

A = a * b

Where:

a: It is the length of the rectangle

b: It is the width of the rectangle

According to the problem data we have to:

b =\frac {5}{8} \yard\\A = \frac {5} {16} \ yards ^ 2

Substituting:

\frac {5} {16} = a * \frac {5} {8}

We clear "a":

a = \frac {\frac {5} {16}} {\frac {5} {8}}\\a = \frac {5 * 8} {16 * 5}\\a = \frac {8} {16}\\a = \frac {1} {2}

Thus, the length of the fabric is \frac {1} {2} yards.

ANswer:

The length of the fabric is\frac {1} {2} yards.

5 0
4 years ago
Rewrite the function f of x equals 4 times one third to the 2 times x power using properties of exponents.
SCORPION-xisa [38]

Answer:

Option 1

Step-by-step explanation:

Given : Function f of x equals 4 times one third to the 2 times x power.

To find : Rewrite the function using properties of exponents ?

Solution :

Writing the function in numeric terms,

f of x equals 4 times one third to the 2 times x power

i.e.

Solve the expression,

i.e. f of x equals 4 times one ninth to the x power.

7 0
4 years ago
Megan uses cup of almonds to make 4 cups of trail mix. Using this
djverab [1.8K]
Answer:
2 1/4 cups

Step by step:
First we can set up a ratio (1:4). Then we can divide both by 4 to find how many cups of almonds per cup of trail mix. We get 0.25:1. Multiply both by 9, and there’s the answer (2.25:9).

Hope this helped <3
6 0
3 years ago
Other questions:
  • Find the quotient of 2,300 and (0.4 · 10-8). In your final answer, include all of your calculations.
    9·1 answer
  • There are 2 orange picks for every 5 picks if there are 21 picks in total how many picks are orange
    15·1 answer
  • Select all of the terms that apply to the shape. pentagon hexagon heptagon octagon nonagon decagon regular polygon irregular pol
    8·2 answers
  • On our way to physical her parents Jennifer drives 265 miles in five hours what is her average rate of ace of speed in miles per
    15·1 answer
  • The product of x and 6 is greater than or equal to 25
    14·1 answer
  • The expression 27 + 45 as a product using the GCF and distributive property.
    15·1 answer
  • Pint-Sized Portraits has 4 different backgrounds and 5 poses in which to photograph children. How many different pictures are th
    6·1 answer
  • Harold’s balance in his savings account was $10,000. The savings account earns annual simple interest. At the end of 3 years, th
    6·1 answer
  • You have been commissioned to design a monument to Mr. Mullen. The monument consists of a pool 100 ft long where observers stand
    6·2 answers
  • 4c=-40 i don't know this and i need help<br> ill do what i can in return
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!