Answer:
83, 245
Step-by-step explanation:
Using the rule multiply by 3, then subtract 4
a₄ = 3 × a₃ - 4 = 3 × 29 - 4 = 87 - 4 = 83
a₅ = 3 × a₄ - 4 = 3 × 83 - 4 = 249 - 4 = 245
The next 2 terms are 83, 245
A marine biologist randomly selected and placed radio tracking devices on 50 dolphins swimming in the Gulf of Mexico in 2020. He released the dolphins back into the population. A year later he caught 200 dolphins and found that 20 of them had tracking devices on them. What is the best estimate of the population of dolphins swimming in the Gulf of Mexico?
Answer:
Step-by-step explanation:
"The capture-recapture of individually distinctive signature whistles has not been attempted before," says the paper's senior author Dr Tess Gridley, Co-Director of Sea Search and the Namibian Dolphin Project and a postdoctoral fellow in the Department of Botany and Zoology at SU. "The dolphins use these sounds throughout life and each has its own unique whistle. Therefore, by recording signature whistles over time and in different places we can calculate where animals are moving to and how many animals there are in a population."
Working with Dr Simon Elwen of Stellenbosch University, the Namibian Dolphin Project has been researching Namibia's resident bottlenose dolphins for the past 12 years, and built up a catalogue of more than 55 signature whistles dating back to 2009.
This particular study was led by Emma Longden, who began the project during her BSc (Hons) Marine Biology degree at the University of Plymouth. As an undergraduate, Emma completed an internship with the Namibia Dolphin Project for a month in 2016, and returned again in 2018 to complete work on the mark-recapture project.
She analysed more than 4000 hours of acoustic data from four hydrophones positioned along the coast south and north of Walvis Bay, Namibia, during the first six months of 2016.
All in all, they identified 204 acoustic encounters, 50 of which contained signature whistle types. From these encounters, 53 signature whistle types were identified; 40 were in an existing catalogue developed in 2014 for the Walvis Bay bottlenose dolphin population, and 13 were newly identified. Of the 53 signature whistle types identified, 43% were captured only once, whereas the majority (57%) were recaptured twice or more.
"One of the great things about bioacoustics is that you can leave a hydrophone in the water for weeks at a time and collect so much data without interfering with the lives of the animals you are studying," says Emma, whose work on the project was also supervised by Dr Clare Embling, Associate Professor of Marine Ecology at the University of Plymouth.
Dr Embling added: "This work is incredibly important as it allows us to track and count the number of dolphins in small vulnerable populations. It builds on our previous research looking at the impacts of noise on marine organisms and monitoring vulnerable marine mammal populations. It also showcases the fantastic level of research that our marine biology students are able to achieve, and the opportunities available to them through our partnerships with conservation organisations such as the Namibia Dolphin Project and the Ocean Giants Trust."
Future research includes the work undertaken by PhD student Sasha Dines from Stellenbosch University to further refine the technique to better understand the population of endangered humpback dolphins in South Africa. Another PhD student, Jack Fearey from the University of Cape Town, is continuing to conduct research along the Namibian Coast.
Solve for z. 7z+ 4 – 9z = 8 z = [?]
Answer:
z = -2
Step-by-step explanation:
7z + 4 - 9z = 8 (The first step is to combine like terms, so 7z -9z = -2z)
-2z + 4 = 8 (Subtract 4 on each side)
-2z = 4 (Divide each side by -2)
z = -2
You can plug -2 back in to check, and you get:
7(-2) + 4 -9(-2) = 8
-14 + 4 + 18 = 8
8 = 8
Hopefully, this helped. Good luck!
Answer:
z=-2
Step-by-step explanation:
7z+4-9z=8
7z-9z=8-4
-2z=4 divide by-2
z=-2
What does f(2)=10 mean in the context of the situation?
Answer:
it means 2 × 5 = 10 is this good
Solve for a. -4a - 2a – 7 = 11 a = [?]
Answer:
a = -7/17
Step-by-step explanation:
Add -4a to -2a
This makes -6a. Then you add 6a to the left to cancel it out, but you must also add 6a to the right of the =
Then you have -7 = 17a
Divide 17 from both sides and you have -7/17 = a
100 points
Given log34≈1.262 and log37≈1.771, what is the value of log3(7 / 16)?
Use three decimal places
log3(7 / 16) =
Answer:
-0.753Step-by-step explanation:
Given
log₃4 ≈ 1.262 and log₃7 ≈ 1.771To find
log₃(7/16)Solution
log₃(7/16) = log₃7 - log₃16 = log₃7 - 2log₃4 =1.771 - 2*1.262 = -0.753So
log_3(7/16)log_3(7)-log_3(16)log_3(7)-log_3(4²)log_3(7)-2log_3(4)1.771-2(1.262)-0.7531. Which form shows the slope-intercept form?
y = mx +b
Ax + By =C
y-y1 = m(x-x1)
Answer:
y = mx + b
Step-by-step explanation:
b is your y intercept while m is your slope which is just rise over run.
the area of a semi circle when the radius is 28cm
Math help help help asap
Answer:
a) 0.071
b) 0.884
Step-by-step explanation:
a)
7.1 * 10^(2) = 7.1 * 0.01 = 0.071
b)
(6.8 * 10^2) * (1.3 * 10^(-3)) = 6.8 * 1.3 * 10^2 * 10^(-3) = 8.84 * 10^(-1) = 8.84 * 0.1 = 0.884
Answer:
a) 0.071
b) 0.884
Step-by-step explanation:
b) explanation
Group coefficients together and exponents together to multiply numbers in scientific notation.
(6.8 ⋅ 1.3) (10^2 ⋅ 10^−3)
Multiply 6.8 by 1.3
8.84 (10^2 ⋅ 10^−3)
Use the power rule a^m a^n = a^m+n to combine exponents.
8.84 ⋅ 10^2 − 3
Subtract 3 from 2
8.84 ⋅ 10^ − 1
Convert 8.84 ⋅ 10^ − 1
from scientific notation.
0.884
hope this helps :) sorry I didn't include an explanation for a
p.s. i really need brainliest :)
Rolling a 6 sided die. Find the probability the number rolled is less than 3 given that it’s a factor of 6.
( help please :) )
Answer:
33.333%
Step-by-step explanation:
a 6 sided die has the number 1,2,3,4,5,6. 2 are less than three so the chances of getting the of getting a number less than 3 is 2/6, simplified 1/3.
What is the square root of 6 - the square root of 12?
Please answer fast!
Answer:
1.01 or 1.0
Step-by-step explanation:
What is ac equal to
Answer:
X=2.87
Step-by-step explanation:
Sin x= Opposite/hypotenuse
Sin35=x/5
X=5sin35
X=AC=2.87
how many solutions does the function x^2+2x+2=0
a. 0
b. 1
c. 2
d. 3
Answer:
A. 0
Step-by-step explanation:
use discriminant. discriminant value is negative so 0 solutions
Range the temperature from lowest to highest
For points!!!
Answer:
-5, -3, 9, 11, 15, 22
Step-by-step explanation:
idrk how to explain
You love watching movies on your phone! Unfortunately each movie uses about
0.75GB. For this billing cycle, you’ve already used up 3 GB and your cellular plan
has a 15 GB data limit. How many movies can you watch without going over your
data limit?
2) Is there only one possible value for M (the number of movies you can watch
without going over your data limit) or many values? Explain.
Answer:
2
Step-by-step explanation:
HELP PLEASE!! ILL GIVE BRAINLIEST
In the image provided, the circle is centered at point W with ZX←→ and ZY←→ tangent to ⊙W at X and Y, respectively.
Given ∡XWY=75°, what is ∡XZY?
A. 105°
B. 150°
C. 75°
D. 15°
9514 1404 393
Answer:
A. 105°
Step-by-step explanation:
The external angle at Z is the supplement of the internal angle at W.
Z = 180° -75° = 105°
∠XZY = 105°
The number of music CDs sold in 1993 by one company was approximately 2.4 x 100. The number of music CDs sold by the same
company in 2001was approximately 7.3 x 107. What is the difference in CDs sold between 1993 and 2001?
sobod uopsand
A. 70,600,000
OB. 16,700,000
C. 7,060,000
D. 1,670,000
Reset Selection
US 5:33
o
Lenovo
Answer:
A
Step-by-step explanation:
9-x/5=3 solve the folloswing equation for x
Answer:
x = 30
Step-by-step explanation:
A bag with 5 pound of potatoes costs $3.20. How much do 12 pounds of potatoes cost at the same rate?
Answer:
$7.68
Step-by-step explanation:
You must find the rate first, so in order to do that you divide the price by the quantity which is
3.20/5
which equals .64 and this number is the cost of potatoes per pound so to find 12 pounds you do
.64 * 12
which equals 7.68
Answer: 7.68
Step-by-step explanation:
First you find the rate where you do 3.20/5 which equals .64
Then you multiply the 12 and .64 and get 7.68
Please answer these 2!!!
Step-by-step explanation:
Answer attached...
Hope it helps :)
Please help and explain thanks
A. EAD
B. DAC
C. BCA
D. CAE
Answer: EAD
Explanation: The angle mark is in between the points E, A, and D.
what expression is equivalent to (3^2)^-2
Answer:
1/81
Step-by-step explanation:
You just tap the calculator
im B.O.R.E.D I NEED TO T.A.L.K
Answer: hi thanks for the five
Step-by-step explanation:
..........................
Answer:
= -15.4
Step-by-step explanation:
-10.6-4.8
= -(10.6+4.8)
= -15.4
you basically just add the negatives.
i hope this helps :)
Answer:
-15.4
Step-by-step explanation:
Subtract the numbers -10.6 - 4.8 to get -15.4
If you have any questions revolving around this topic,feel free to ask me and i will be happy to help,Good luck!
PLEASE HELP THIS IS VERY IMPORTANT I WILL GIVE YOU BRAIN THING IF ITS CORRECT (you can use a calculator if you want)
a is 321. b is 52 . GOOD luck !!!!!!!!!!!!!!!!!
Solve for the value of k.
k=6
have an amazing day bye!
Answer:
Hello! k = 6
Step-by-step explanation:
40 + 90 = 130 so our last angle must be 50 sense this will add up to 180 so k = 6 because 7 x 6 = 42 and 42 + 8 = 50 so answer 6
os there one solution, no solutions, or infinate solutions to 4(4x-3) = 8(2x-2)+4
Answer:
All real Numbers, which basically ,means infinite solutions
Step-by-step explanation:
To test the effect of partial day care on academic performance in young children, you plan to use two groups of 4-year-olds from the same preschool class: one group is made up of randomly selected children who attend part-time day care; the other group includes randomly selected children who do not attend any day care other than preschool. Both groups will complete a brief test of academic performance during a regular preschool class. Which type of test should you use to compare the mean scores of the two groups
Answer:
Independent samples t test
Step-by-step explanation:
The experiment performed above, required the independent samples t test as it invilves two seperate and distinct, otherwise called independent groups whereby one group has no effect on the outcome of the other. The means a ND standard deviation of the first group (4 year Olds who attend part time daycare) and the other group (4 year Olds who do not attend part time daycare). Hence, the comparison can be made using the two independent samples t test ;
With possible hypothesis relation being :
H0 : μ1 = μ2
H1 : μ1 ≠ μ2
Given that
X2: (20 – 3x) = 1 : 2
find the possible values of x.
Answer:
Step-by-step explanation: x^2 : (20 - 3x) = 1 : 2
2x^2 + 3x - 20 = 0
(x + 4)(2x - 5) = 0
Solution:
x = -4
x = 5/2
Answer:
x= 2.5
x= 2.5x = - 4
Step-by-step explanation:
1:2
x² : (20 - 3x)
x2 : x 1
2x² : 1(20-3x)
2x² : 20 - 3x
+3x , then - 20
2x² + 3x - 20 = 0
2 x - 20 = - 40
x to get - 40
+ to get 3
(8 x - 5 = -40 & 8 + - 5 = 3)
Split 3x into 8x & - 5x, then factorise:
2x^2 + 3x - 20 = 0
2x^2 + 8x - 5x - 20 = 0
2x(x+4) - 5(x + 4)
(2x-5) (x+4) =0
2x - 5 = 0
+5
2x = 5
÷2
x = 2.5
x+4=0
-4
x = - 4
x=2.5,-4
Hope this helps!
Solve for
x
xx.
Enter the solutions from least to greatest.
x
2
+
7
=
43
Answer:
The answer would therefore be 'x=18'.
Answer:
Step-by-step explanation:
7/7