Answer:
3:4
Step-by-step explanation:
This ratio can be written as 15/20. 15 and 20 are both divisible by 5 so if you simplify this fraction by dividing both numbers by 5 you get 3/4 or 3:4.
A marine biologist wants to estimate the average weight of a population of dolphins living in a certain region of the ocean. The biologist will collect a random sample of dolphins and use the sample weights to create the estimate Which of the following is an appropriate method for the biologist to use for inference to the population?
A A one-sample t-interval for a population mean
B A one-sample t-interval for a sample mean
C A one-sample 2-interval for a population proportion
D A matched-pairs t-interval for a mean difference
E A two-sample t-interval for a difference between means
Answer:
A A one-sample t-interval for a population mean
Step-by-step explanation:
The biologist will collect a random sample of dolphins and use the sample weights to create the estimate.
In a confidence interval, we take the data from the sample and want to estimate it for the entire population, so the interval is for a population mean.
The standard deviation will be taken from the sample, which means that the t-interval is used.
We want for one population, so it is a one sample for the population mean, and the correct answer is given by option A.
An economist conducts a nationwide survey to study the financial perceptions of US adults. Specifically, he asks a random sample of 1,000 US adults: “Financially, are you doing OK or are you struggling to get by?” The results of the survey show that 829 of the 1,000 participants said they are doing OK.
(a) Construct a 95% confidence interval for the proportion of US adults who would say they are doing OK.
(b) Shortly thereafter, a similar study is conducted in Mexico with the intention of constructing a 95% confidence interval for the proportion of Mexican adults who would say they are doing OK. What is the smallest sample size that can be used to guarantee that the margin of error will be less than or equal to 0.01?
Answer:
a) (0.806, 0.852)
b)Margin of error ≤ 0.01
1.96*√{0.5*(1–0.5)/n} ≤ 0.01
√n ≥ 98
n ≥ 9604
• Smallest sample size = 9604
Step-by-step explanation:
I found this on Chegg
17/2 is bigger than what?
Answer:
7/2= 8.5 so it can be bigger then 1/2 or anything under 8.5
Step-by-step explanation:
1. A bank account started with $1000 and earned $10 interest per month
for two years. The bank then paid 2% interest on the account for the
next two years.
Answer:
What exactly is the question here ？？ （lol）
express 75 as prodict of prime factor
75 = 1 x 75, 3 x 25,
or
75 = 3 xx 5^(2)
Solve for z.
-30 = 5(x+1)
What’s the answer please help !!!!
Question 1
Which set of numbers below can be used to make a triangle?
10, 1,9
4,8,5
1,1,5
O 2, 6, 12
Answer:
The Ans is 4,8,5
Step-by-step explanation:
As 8 is the base and 4,5 are sides
Hope it helps you
Find the value of x.
m2 = x + 85
2
73°
Answer:
-12
Step-by-step explanation:
in an iscocles, the base angles equal eachother so,
73=x+85
x=-12
one bar of candy A and two bars of candy B have 769 calories. Two bars of candy A and one bar of candy B contain 776 calories. Find the caloric content of each candy bar.
Step-by-step explanation:
Hjqjzjzj is a complete* of the following elements has the largest atomic size in the world is the difference between human rights
Answer:
We know:
A+2B=777
2A+B=789
Let's rearrange the first equation to solve for A:
A=777-2B
Now let's plug 777-2B in for A in the second equation, and solve for B:
2(777-2B)+B=789
1554-4B+B=789
1554-789=3B
765=3B
B=255
Now we can substitute 255 in for B in the first rearranged equation, and solve for A:
A=777-2(255)
A=777-510
A=267
So candy bar A has 267 calories, and candy bar B has 255
I Hope it helps
Question 5 of 10
Which of the following is most likely the next step in the series?
CO
Answer:
c. because the first one has 6 sides the second one has 5 sides and the third one has 4 sides so that means has 3 sides which is the triangle.
Please help me with this ᕕ( ᐛ )ᕗ thank you!
Answer:
B
Step-by-step explanation:
We can create the equation step-by-step:
Each row of bricks is 6.5cm and the number of row of bricks is r: 6.5r
Total of height of wall: = 259cm
Top row is 1cm shorter: -1cm
Combine all the terms together and we get: 6.5r - 1 = 259
Which means each row of bricks is 6.5cm but minus 1cm from the top to get 259cm the total :D
Mr. Hernandez dilates the triangle shown below by a scale factor of 2 with the origin
as the center to obtain AA'B'C'.
Answer: only student 2
what is the purpose of the dx in the integral ∫2x dx?
Answer:
[tex]dx[/tex] denotes an infinitesimal displacement along [tex]x[/tex]
Step-by-step explanation:
The integration refers to the antiderivative of a function. The inverse process of differentiation is the integration.
The integration is used to find the volume and area under the curve.
In ∫ [tex]2x\,\,dx[/tex]
∫ denotes the sign of integral,
[tex]dx[/tex] denotes an infinitesimal displacement along [tex]x[/tex],
[tex]2x[/tex] is the part to be integrated.
In the diagram below, which distance represents the distance from point Qto
RS?
Answer:
QT
Step-by-step explanation:
Given
The attached diagram
Required
Which distance represents Q to RS
The distance from Q to RS is determined by drawing a perpendicular line from Q to RS.
From the diagram, the perpendicular from Q to RS meets RS at point T.
Hence, the required distance is represented by QT
find the area of ABC
Answer:
area of ABC=1/2 b×h=1/2×20×6=30m²
Answer:
60 m^2
Step-by-step explanation:
( Base * Hight / 2 = Area)
20 * 6 = 120
120 / 2 = 60
Calcula el área de los rombos.
Answer:
xbxbkzkdkdjd
Step-by-step explanation:
bz va yJnzz
Treys grandmother has a framed picture with side lengths that are 12 inches. Trey wants to know how much wall space is needed for the picture.
Answer:
144 inches
Step-by-step explanation:
Answer:
144 inches :)
Step-by-step explanation:
LIBBY NEEDS TO MAKE 1/2 OF HER CHILLI RECIPE FOR THE SCHOOLS CHILI CONTEST.IF LIBBY USUALLY NEEDS 2 CUPS OF CORN FOR HER CHILI RECIPE,HOW MUCH CORN WILL SHE NEED FOR THE CHILI CONTEST?
A. 1 CUP
B. 1/4 CUP
C. 4 CUPS
D. 2/4 CUP
Answer:
a
Step-by-step explanation:
because she only need a half of it
Answer:1/4
Step-by-step explanation:
4 x 3/4 is greater than 3/4 , since 4 is greater than 1. True o false
Answer:
Trueeee I guessss
Step-by-step explanation:
I don't know
Find the H.C.E of 108 and 72.
Answer:
36 is the HCF of 108 and 72
Answer:
36.
Step-by-step explanation:
HCF of 108 and 72
108 = 2 * 2 * 3 * 3 * 3
72 = 2 * 2 * 2 * 3 * 3
So picking out the common factors we have
HCF = 2 * 2 & 3 * 3
= 4 * 9
= 36.
Select the letter for the correct answer
,
Answer:
a) 2
Step-by-step explanation:
4:8 and 6:12
4/8 and 6/12
we flip them since we want to find the conversino
8/4 and 12/6
simpilify
2 and 2
scale factor was 2
hope this helps, lmk if it is correct
Please refer to the pictures below
Answer:
D
8-2
Step-by-step explanation:
System of inequalities are
x + y ≥ 7
8x + 7y ≤ 82
A. 2 sqrt 3
B. 4
C. 8
D. 4 sqrt 6
E. 12
Please help
Answer:
Option B. 4
Step-by-step explanation:
From the question given above, the following data were obtained:
Angle θ = 60 °
Opposite (Fe) = 4√3
Adjacent (DE) = x
The value of x can be obtained by using the Tan ratio as illustrated below:
Tan θ = Opposite / Adjacent
Tan 60 = 4√3 / x
√3 = 4√3 / x
Cross multiply
√3 × x = 4√3
Divide both side by √3
x = 4√3 /√3
x = 4
Thus, the length of DE is 4
can u pls help me i am really stuck this is a geo problem pls get to me as soon as possible thanks.
Question: find the value of x.
Answer:
Please refer to the attachment
a statement for the equation p-6=10
Answer:
See Explanation
Step-by-step explanation:
Given
[tex]p - 6 = 10[/tex]
Required
Write a statement for the expression
The statement is:
The cost of a grater is $6 less than the cost of an electric cooker, What is the of the electric cooker?
The above statement when translated to a mathematical expression is:
[tex]p - 6 = 10[/tex]
Where p represents the cost of the cooker
Solving for p.
[tex]p = 10 + 6 = 16[/tex]
bonjour,pouvez vous m’aider ;)
a. calculer DC
b.en déduire que ED =1,60 m
c.une fillette mesure 1,10 m
elle passe a 1,40m derrière la camionnette.
Le conducteur peut-il la voir ? expliquer
Données :
(AE) // (BD)
AE = 1,50 m
BD = 1,10 m
EC = 6 cm
Answer:
je suis super nul en math desolee
Take ur time i just need a anwser ;w;
Answer:20 people
Step-by-step explanation:
Determine the missing card value that will result in a product of -324
-6 3 -9
Answer:
-2
Step-by-step explanation:
-324 ÷ -6 ÷ 3 ÷ -9 = 162
-324 ÷ 162 = -2
What geometric term describes PQ and RS
Answer:
perpendicular lines
Step-by-step explanation:
Two lines in a plane are said to be perpendicular if they intersect in such a way that the angles formed between them are right angles. In the adjoining e, lines PQ and RS intersect at 0 such that ∠ROQ = ∠ ROP = ∠POS = ∠QOS = 90°. Therefore, we say that PQ is perpendicular to RS
