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
icang [17]
3 years ago
12

A certain forest covers an area of 3900 km2 . suppose that each year this area decreases by 8% . what will the area be after 10

years? use the calculator provided and round your answer to the nearest square kilometer.
Mathematics
1 answer:
stiv31 [10]3 years ago
3 0

<span><span>A = P(1-r)^t
</span><span>
A = 3900(1-0.08)^10

A = 3900(0.92)^10 </span></span><span><span>

A = 3900(0.434388454)

A = 1694.11

1694 square km</span></span>


You might be interested in
A boat is spotted in the water with an angle of depression of 25° from the top of a lighthouse that is 89 feet tall. To the near
stepan [7]
To calculate this you need to imagine triangle which points are:
boat
Top of lighthouse
Bottom of lighthouse

That triangle has 90 degrees angle at bottom of lighthouse. That means that we can use trigonometry to determine length between boat and bottom of lighthouse

tan(25) = 89/x
x = 89/tan(25)
x = 190.86

after rounding, the answer is D, 191 feet
4 0
3 years ago
Read 2 more answers
What is x+y=8 and 5x+3y=34 graphed on the same graph
expeople1 [14]
To help you graph this, get y alone in both equations. If you don't have a graphing calculator, use the Desmos graphing calculator online.

So, you will end up graphing this:
y=8-x
y=(34/3)-(5/3)x

They will meet at (5,3)

8 0
4 years ago
Consider the function f(x)= 1-|x-1|+|x+1| for -3&lt;x&lt;3. Recall that the absolute function can be represented as a piece wise
Kruka [31]
By the definition for the absolute value,

|x-1|=\begin{cases}x-1&\text{for }x\ge1\\-(x-1)&\text{for }x
|x+1|=\begin{cases}x+1&\text{for }x\ge-1\\-(x+1)&\text{for }x

So for the compound function f(x)=1-|x-1|+|x+1|, there are three intervals to consider. What happens when x? when -1\le x? when x\ge1?

You have

f(x)=\begin{cases}1-(-(x-1))+(-(x+1))=-1&\text{for }x
8 0
4 years ago
The sum of twice a number and 9 is 43
Irina-Kira [14]
2x + 9 = 43 This is the equation.
2x = 34 Subtract 9 from both sides.
x = 17 Divide both sides by 2.
6 0
3 years ago
How do I do this? <br><br> help!!
kakasveta [241]

Answer:

...

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • Which system of inequalities has a lot of solution?
    15·2 answers
  • The area of a parallelogram is 240 cm² and the height is 20 cm² find the corresponding base
    9·1 answer
  • Which of the following numbers is probably an irrational number? 1.) -5 2.) 1.6490221... 3.) 3/4 4.) 0
    5·2 answers
  • What is the solution to the linear equation?<br> 2/3x - 1/2=1/3 + 5/6x
    10·1 answer
  • Please Help!!!
    8·2 answers
  • Express the formula P = 21 2w in terms of length,L. Use the new to find the length when the perimeter is 68 and the width is 13.
    12·1 answer
  • The hypotenuse of a right triangle measures 14 cm and one of its legs measures 1 cm. Find the measure of the other leg. If neces
    13·1 answer
  • 100 PTSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS
    13·2 answers
  • Which number will make the two fractions equivalent 42/50 84/?
    11·2 answers
  • PLSS HELP ME WITH THIS!! 25 POINTS!
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!