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
Arisa [49]
2 years ago
9

Can someone please help me on this one

Mathematics
1 answer:
Artemon [7]2 years ago
7 0

Answer:  78.5 units^2

Step-by-step explanation:

The area of the circle is equal to pi*radius^2.

The diameter is double the radius, which means the radius is 10/2 = 5.

Therefore, the area is pi*5^2 = 25pi.

We use 3.14 for pi and we get 25*3.14 = 78.5 units^2

You might be interested in
What is the slope of the line containing (6, -7) and (5, -9)?<br> A) 1<br> B) -2.<br> C) 2<br> D) 16
zloy xaker [14]

Answer: C

Step-by-step explanation:

y2-y1/x2-x1

-9+7/5-6 = 2

7 0
3 years ago
????????????????????????????????????????????????????????????????????????????????????????????
ohaa [14]

Answer: A is first

Step-by-step explanation:

3 0
2 years ago
The quotient of 18 and a number a
irina [24]

Answer:

18÷n or 18a

Step-by-step explanation:

8 0
3 years ago
For what values of x does the binomial 2x−1 take on a positive value?
Mashutka [201]
1). 2x-1>0
2x>1
x>½

2) 21-3y<0
-3y<-21
y>7

3) 5-3c>80
-3c>75
c<-25
3 0
3 years ago
A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks along the x-axis from the spotlight toward the bui
Sedbober [7]

Answer:

0.675 m/s

Step-by-step explanation:

Let height of shadow= y,CD=x

Height of man=2 m

Speed of man= \frac{dx}{dt}=1. 8 m/s

\triangle ABD\sim\triangle ECD

Therefore, \frac{AB}{EC}=\frac{BD}{CD}

\frac{y}{2}=\frac{12}{x}

xy=24

Differentiate w.r.t t

x\frac{dy}{dt}+y\frac{dx}{dt}=0

x\frac{dy}{dt}=-y\frac{dx}{dt}

\frac{dy}{dt}=-\frac{y}{x}\frac{dx}{dt}

When the man is 4 m from  the building

Then, we have x=12-4=8 m

\frac{dx}{dt}=1.8 m/s

Substitute the values in above equation then, we get

8y=24

y=\frac{24}{8}=3

Substitute the values then we get

\frac{dy}{dt}=-\frac{3}{8}\times 1.8=-0.675 m/s

Hence, the length of his shadow on the building decreasing at the rate 0.675 m/s.

8 0
3 years ago
Other questions:
  • Can someone please help me! Do not input spaces. Remember an equation has an equal sign.
    9·1 answer
  • What is the solution to the equation 3(x- 1) - 2(2x + 1) = 8(x - 1)?
    12·1 answer
  • Please help me with this !
    8·1 answer
  • You drive from your home to a vacation resort 420 miles away. You return on the same highway. The average velocity on the return
    12·1 answer
  • The table shows a direct variation.
    12·1 answer
  • A triangle has side lengths 11, 12, and 15. Is it acute, obtuse, or right?
    14·1 answer
  • Simplify (6 + 4i) + (3 - 3i)
    11·1 answer
  • Hey! i’ll give brainliest please help
    13·1 answer
  • Your teacher said you could use notes cards on the test. You studied and wrote seven
    8·1 answer
  • What is the value of x? image below
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!