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
dlinn [17]
3 years ago
12

I need help on this plz i don’t understand the question

Mathematics
1 answer:
AnnZ [28]3 years ago
3 0

We know that the area of a circle in terms of π will be πr². However the area with respect to the diameter will be a different story. The first step here is to find a function relating the area and diameter of any circle --- ( 1 )

For any circle the diameter is 2 times the radius,

d = 2r

Therefore r = d / 2, which gives us the following formula through substitution.

A = π(d / 2)² = πd² / 4

<u>Hence the area of a circle as the function of it's diameter is A = πd² / 4. You can also say f(d) = πd² / 4.</u>

Now we can substitute " d " as 4, solving for the area ( A ) or f(4) --- ( 2 )

f(4) = π(4)² / 4 = 16π / 4 = 4π - <u>This makes the area of circle present with a diameter of 4 inches, 4π.</u>

You might be interested in
How do you integrate 7xe^-5x²?
Nana76 [90]
Making assumptions about where parentheses should be, 
<span>Let u = -7x </span>
<span>du = -7dx </span>
<span>dv = e^(2x) dx </span>
<span>v = e^(2x)/2 </span>
<span>∫ -7xe^(2x) dx = </span>
<span>-7xe^(2x)/2 - ∫ e^(2x)/2 (-7) dx = </span>
<span>-7xe^(2x)/2 + 7e^(2x)/4 + c</span>
3 0
3 years ago
Simplify the expression 5+4+2(-3)+7+(-5)
liberstina [14]
Just use pemdas
(Parenthesis, exponents, multiplication, division, addition, subtraction)
4 0
3 years ago
Math homework questions ​
DanielleElmas [232]
Y= 1/2x -2 is the equation for this line.
3 0
3 years ago
34. x-y=3 Slope-Intercept Form
ale4655 [162]
I don’t know I need the points for my homework though, deepest apologies
7 0
2 years ago
Read 2 more answers
PLEASE HELP?! IM SO CONFUSED!!
Andre45 [30]

Answer:

C.

Step-by-step explanation:

-3 7/8 rounds down to -4

4.63 rounds up to 5

-4 x 6 + 5

-24 + 5

-19

her answer (-19.14) also rounds to -19

So yes, it is reasonable and the correct response is C.

5 0
2 years ago
Other questions:
  • What functions have real zeros at 1 and 4
    13·1 answer
  • 5+x/6=-1 What is x??​
    8·2 answers
  • Which of the binomials below is a factor of this trinomial?
    12·1 answer
  • Dennis has 5 fish. 2 of the fish are orange and the rest are blue. How many blue fish does Dennis have?
    14·2 answers
  • The measure of one interior angle of a regular polygon is two times the measure of one of its exterior angles. How many sides do
    12·1 answer
  • Which number produces an irrational number when added to 0.4?<br> B. 0.444...<br> C.2/7
    11·1 answer
  • What is the independent and dependent variable in this statement, types of pizza or number of votes
    14·1 answer
  • C^2 = 27<br><br> Pls help me I’m doing my missing math work :,)
    13·1 answer
  • Jill is weighing between two job offers. Job offer 1, would pay her a base salary of
    10·1 answer
  • Write the equation x + 3y = -4 in slope-intercept form, and then find the slope and y-intercept.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!