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
dmitriy555 [2]
3 years ago
10

The number of trees in a rainforest decreases each month by 0.5%. The forest currently has 2.5 billion trees. Which expression r

epresents how many trees will be left in 10 years. Group of answer choices
Mathematics
1 answer:
Blababa [14]3 years ago
8 0

Answer:

y=2.5*10^9(0.005^{12 0}) \\\\

Step-by-step explanation:

The above question is in the form of an exponential decay. The equation for an exponential decay is given by:

y=ab^x

where y and x are variables, b < 1, a is the initial value of y (that is the value of y when x = 0).

Let y represent the number of trees left and x represent the number of months. Given that there is currently 2.5 billion trees, therefore a = 2.5 * 10⁹, b = 0.5% = 0.005. The equations becomes:

y=2.5*10^9(0.005^x)\\\\After\ ten\ years(x=10*12\ months=120\ months):\\\\y=2.5*10^9(0.005^{12 0}) \\\\

You might be interested in
I ate a monkey :0<br> AHHHHHHHHHHHHHHHH
Lisa [10]

sopa de macaco uma delicia

6 0
3 years ago
Read 2 more answers
What is the distance between (4, -10) and (4,-4)?
bixtya [17]

Answer:

For x there is no distance since they are both for. For y, they are -6 apart.

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
A woman has 21 total coins in her pocket, all of which are either dimes or quarters. If the total value of her change is $3.90,
Elza [17]

Answer with Step-by-step explanation:

Let there be d dimes and q quarters

A woman has 21 total coins in her pocket.

⇒ d+q=21    ------(1)

1 dime=$ 0.1

1 quarter=$ 0.25

The total value of her change is $3.90

⇒ 0.1d+0.25q=3.90

Multiplying both sides by 100,we get

10d+25q=390     --------(2)

(2)-10×(1)

10d+25q-10d-10q=390-210

15q=180

Dividing both sides by 15, we get

q=12

Putting value of q in (1),we get

d=9

Hence, Number of dimes=9

and number of quarters=12

Write the number of dimes, then the number of quarters separated by a comma.

9,12

8 0
3 years ago
Read 2 more answers
Are the decimals 0.4 and 0.40 equal?
zepelin [54]
0.4 and 0.40 are equal. That zero on the hundredths place does not matter.
3 0
3 years ago
Read 2 more answers
What number must you add to complete the square?
eimsori [14]

Answer:

36

Step-by-step explanation:

x^2 + 12 x  = 40

To complete the square, take the coefficient of the x term

12

Divide by 2

12/2 = 6

Square it

6^2 = 36

Add 36 to each side

8 0
3 years ago
Other questions:
  • Which of the following is the best answer to 4/5 minus 2/3
    14·2 answers
  • What is 30/1 simplified
    15·2 answers
  • Multiply 5x^2-6x+2 4x^2-3x
    7·2 answers
  • How to simplify the expressions of 5p-5-10-2p
    6·1 answer
  • Square Root Of 0.36 is<br> 1. 0.6<br> 2. 0.06<br> 4. 1.8<br> 5. 0.18<br><br> please Help me
    5·2 answers
  • Algebra 2 help please
    6·1 answer
  • Approximate which two integers √210 is between.<br>​
    6·1 answer
  • LM=9, NR=16, SR=8. Find the perimeter of △SMP.
    13·1 answer
  • Whats the density of an object with the length of 5.0 cm a height of 3.0 and width of 15.0 cm and a mass of 24 grams
    13·1 answer
  • A store sells 24 greeting cards for $12.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!