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
Cerrena [4.2K]
3 years ago
8

Please show work if you do, ( and get it right) I will make you brainliest!!!

Mathematics
1 answer:
DerKrebs [107]3 years ago
3 0

Answer:

The percentage increase in bird population in the second years is 4%  .

Step-by-step explanation:

Given as :

During two years, the population of birds of an island became 7 times more than before.

The the percentage increase in first year = = r_1 =40%

Let The percentage increase in second year =  r_2 = r%

So, According to question

The initial population of bird = x

The increase population of bird =7 times before = 7 x

Now,

The increase population of bird = initial population of bird × (1+ \dfrac{r_1}{100}) ×  (1+ \dfrac{r_2}{100})

Or, 7 x = x × (1+ \dfrac{40}{100}) ×  (1+ \dfrac{r}{100})

Or, \dfrac{7 x}{x} = 1.4 ×  (1+ \dfrac{r}{100})

Or, 7 = 1.4 ×  (1+ \dfrac{r}{100})

Or, \dfrac{7 }{1.4} = (1+ \dfrac{r}{100})

Or, 5 = (1+ \dfrac{r}{100})

Or, (1+ \dfrac{r}{100}) = 5

Or, \dfrac{r}{100} = 5 - 1

Or,  \dfrac{r}{100} = 4

∴ r = 4 × 100

I.e r = 400

so, The percentage increase = r% = 4

Hence The percentage increase in bird population in the second years is 4%  . Answer

You might be interested in
What are the steps to do 4z−(−3z)
Molodets [167]
4z - ( - 3 z) 

= 4 z + 3 z = 7 z 
5 0
3 years ago
Read 2 more answers
I need help pls, i would appreciate it !!
kramer

Answer:

a. x = 1.2, b. A = 32.1°

Step-by-step explanation:

1.41²-.75²=x²

a. x = 1.2

sin A = 0.75/1.41

b. A = 32.1°

5 0
3 years ago
What is <br> 1,295x32=?<br> 1,362x40=?<br> 1,181x23=?
Ad libitum [116K]
1295x32= 41440
1362x40=54480
1.181x23=27163
Hope this helped
8 0
3 years ago
Read 2 more answers
Two trains are 500 miles apart when they first enter a collision course. If, after two hours, the distance between them is 300 m
MrRissso [65]

Answer:

The faster train goes 60mph

Step-by-step explanation:

s= speed

s+20 is the faster train.

Then you are given:

200/s+s+20=2

200=2*(2s+20)

4s+40=200

4s=160

s=40 is the slower train

40+20= speed of faster one

s=60 ;)

6 0
3 years ago
Bryson sent 3,809 text messsages in June. In July, he sent 3,115.
Mama L [17]

Step-by-step explanation:

kkkkk3kk3kek3ekeke293o2o22

4 0
2 years ago
Read 2 more answers
Other questions:
  • The angles of a triangle are 2x, 3x, and 4x degrees. Find the value of x.
    13·1 answer
  • If the number 36,000,000 is written in scientific notation, the numerical value of the exponent is
    7·1 answer
  • Which expressions are equivalent to -9x-21
    10·1 answer
  • I needs helps what is 7 1/3 - 3 2/3 = ????
    6·2 answers
  • What two consecutive numbers lie between the square root of 37
    8·2 answers
  • The radius r of a circle is increasing at a rate of 5 centimeters per minute.
    15·1 answer
  • Helpp me please
    15·1 answer
  • There are 240 calories in 5 ounces of a type of ice cream. How many calories are in 8 ounces of that ice cream?
    15·2 answers
  • Divide $2604 into a ratio of 2:1.
    5·1 answer
  • Find AUB and AnB for set A and B
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!