Answer:
[tex]H_a > \mu = 24.5[/tex]
Step-by-step explanation:
Given
[tex]n = 28[/tex] --- sample size
[tex]\bar x = 25.3[/tex] --- Mean
[tex]x = 24.5[/tex] --- Average
Required
Determine the alternate hypothesis
From the question, we understand that it is safe to drink water at 24.5 ppb or less.
This implies that the null hypothesis is:
[tex]H_0 \le \mu = \bar x[/tex]
i.e.
[tex]H_0 \le \mu = 24.5[/tex]
The opposite of [tex]\le[/tex] is [tex]>[/tex]
So, the alternate hypothesis will be:
[tex]H_a > \mu = \bar x[/tex]
[tex]H_a > \mu = 24.5[/tex]
Hence: (c) is correct
i need the answer asap
Step-by-step explanation:
A (-3 , 4) and C ( 2 , -6 ) and ratio of AB : AC is 4:5
now , let AB be 4x and AC be 5x such that
AC = AB + BC
AC - AB = BC
5x - 4x = BC
x = BC
ratio of AB : BC = 4:1
by using section formula
( mx2 + nx1 / m+n , my2 + ny1 / m+n )
where m = 4 and n = 1
B = ( 4×2 + 1×-3 / 4+1. ,. 4× -6. + 1× 4 / 4+1 )
B = ( 8 -3 / 5. ,. -24 + 4 / 5)
B = ( 5/5. ,. -20/5 )
B = ( 1. , -4 )
Please help! Due soon!
Answer:
a/..the first is 3/8
b/ 84/280
Answer:
a) 3/8
b) 3/10
Step-by-step explanation:
multiply the numerators and the denominators and then simplify.
a) is just 3*1 divided by 4*2, no simplification possible
b) is 4*21 divided by 7*40 is 84/280 and simplifies to 3/10 (divide by 28)
If the total surface area of a cube is 302.46 in2, which best describes the length of the side of the cube?
The surface area of a cube is calculated using the following formula
[tex]S=6a^2[/tex]
If the surface area is given then the side length can be found and vice versa.
We have thus
[tex]302.46=6a^2 \\ 302.46/6=a^2 \\ a=\sqrt{302.46/6}\approx5.8\mathrm{in}[/tex]
Hope this helps.
The H.C.F of 42,70 and 56
Answer: 14
Step-by-step explanation
Do the prime factorization & it will give you 14
Pineapple Street intersects Plum Street and Apple Street at their midpoints. Your home is at point P. You leave your home and jog down Plum Street to Kiwi Street, over Kiwi Street to Apple Street, up Apple Street to Pineapple Street, over Pineapple Street to Plum Street and then back home up Plum Street. How many miles did you jog?
Answer:
7.125 miles
Step-by-step explanation:
Using the triangle midsegment theorem:
Distance of pineapple street = 1/2(distance of kiwi street) = 0.5 * 1.4 = 0. 7 miles
Distance of plum Street = (2 * distance of P to Pineapple street) = 2 * 1.3 = 2.6 miles
Distance from Kiwi to pineapple = 1/2 * distance of apple Street = 0.5 * 2.25 = 1.125 miles
1.3 + 1.3 + 1.4 + 1.125 + 0.7 + 1.3
how I can write this sentences in a expresión .
Answer:
4x + 8
Step-by-step explanation:
Carrie has $10 in a savings account. The interest rate is 10%, compounded annually.
To the nearest cent, how much will she have in 3 years?
Submit
Answer:
she will have 300 dollars
Step-by-step explanation:
Convert improper fraction to a mixed number
9/2
A biologist wants to compare the proportions of rainbow trout infected with whirling disease (an illness of
trout and salmon caused by a microscopic parasite) coming from two separate watersheds. For each
watershed, the biologist will collect a random sample of trout and record the proportion infected in the
sample. The biologist intends to estimate the difference for all trout in the two watersheds. Assuming all
conditions for inference are met, which of the following is the most appropriate method for the biologist to
use to analyze the results?
A
A one-sample z-interval for a population proportion
B
A one-sample z-interval for a sample proportion
с
A one-sample z-interval for a difference in sample proportions
D
A two-sample z-interval for a difference in population proportions
E
A two-sample z-interval for a difference in sample proportions
Answer:
D
Step-by-step explanation:
Because, the biologist wants to find the difference between the population of trouts from two watershed,
A biologist wants to compare the proportions of rainbow trout infected with whirling disease (an illness of trout and salmon caused by a microscopic parasite) coming from two separate watersheds.
The biologist will collect a random sample of trout and record the proportion infected in the sample The biologist intends to estimate the difference for all trout in the two watersheds
According to the given question, the most appropriate method for the biologist will be -A two-sample z-interval for a difference in population proportions
Because,Biologist wants to compare the proportions of rainbow trout infected with whirling disease and find the difference between the population of the trouts from two watershed .
Therefore , Statement D is the Correct
Learn more about Similar questions here : https://brainly.com/question/1904003
A computer game originally sold for $40 but is now on sale for 30% off. What is the sale price of the computer game?
Answer:
28
Step-by-step explanation:
Answer:
28
Step-by-step explanation:
30% of 40 is 12, 40-12=28, the answer is 28.
Find the equation of the line that contains the given point and with the given slope. Write the equation in slope-intercept form, if possible, and graph the line (2,1); slope =3
[tex]\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the Concept of the straight lines.
y-y1 = m(x-x1) + C
====> y - 1 = 3(x - 2)
====> y-1 = 3x -6
====> y = 3x - 5
hence the equation is y = 3x - 5
a party rental company has chairs and tables for rent the total cost to rent 2 chairs and 3 tables is 29 dollars the total cost to rent 6 chairs and 5 tables is 53 dollars what is the cost to rent each chairs and each tables
Answer:
78
Step-by-step explanation:
Is 13/6 rational or irrational ?
Answer:
Rational is the answer
hope this helps
have a good day :)
Step-by-step explanation:
If it's written as a fraction it's rational
which inequality is NOT true if y= -5
Answer:
2y -10 > 13
Step-by-step explanation:
Each box contains 40candy bars
Each box cost $30
How much does the school have to charge for,each candy bar to make a profit $10 per box
Answer:
1.33 (round it up to the nearest dollar which is 1)
Step-by-step explanation:
profit = price charged - cost of goods
$10 = ? - $30
$ 30 = for one box
40 bars = one box
40 / 30 = 1.33 (round it up to the nearest dollar)
you can check this out by:
1 x 40 bars = 40
40 - 30 (the price of each box) = 10
Can someone help please I don’t have much time???
Answer:
1) x<2.5 2) x<2.5 (both are smaller numbers than 2.5)
Step-by-step explanation:
I'm sure there is a easier way to figure this question out but how I did is by simply imputing numbers smaller or bigger into where the x is. For example, I imputed 3 into -4x+5>-5. So, -4(3)+5>5, = -7>5, this is false, so x must be smaller than 2.5 in order for this to be true.
Assume that you have a balance of $4000 on your Discover credit card and that you make no more charges. Assume that Discover charges 21% APR and that each month you make only the minimum payment of 2.5% of the balance.
What will the balance be after 6 years? (Round your answer to the nearest cent.)
Answer:
Step-by-step explanation:
Credit card interest is what are you are charged when you don't pay your credit card bill in full each month. It works as a daily rate calculated by dividing your annual percentage rate by 365, and then multiplying your current balance by the daily rate. That amount is then added to your bill.
How many different ways are there to select a group of 7 out of 9 people for a committee in which there
are 7 distinct roles?
Answer:
P(9,7) = 181440
Step-by-step explanation:
The roles are distinct so order matters. So we must use the permutation formula.
P(n,r)=n!/(n−r)!
P(9,7) = 9! / 2! = 9*8*7*6*5*4*3 = 181440
HELPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP
Answer:
a
Step-by-step explanation:
the answer is a
I want the answer, Due now.
Answer: 60
Step-by-step explanation:
180 degrees because of the line so 180-120 = 60
Answer:
Its 60⁰ I'm positive....
For Problems 2-5, use the thermometer to the right,
Each sentence is stated incorrectly, Rewrite the sentence to correctly describe each
situation
The temperature is 10 degrees Fahrenheit below zero,
b. The temperature is –22 degrees Celsius below zero,
Someone pls answer this!! 10
POINTSSSSSSSS
Answer:
perimeter of square = 4×side.
36cm=4×side.
36/4=side.
9cm=side
There are 9 movies ranked on the summer's "must see movie list." What is the probability that you guess the summer's top two must see movies if you randomly guess?
Answer:
1/36 = 0.0278 = 2.78% probability that you guess the summer's top two must see movies if you randomly guess
Step-by-step explanation:
A probability is the number of desired outcomes divided by the number of total outcomes.
In this question, the order in which the movies are chosen is not important, which means that we use the combinations formula to solve this question.
Combinations formula:
[tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
Desired outcomes:
Top two movies, so only one outcome, which means that [tex]D = 1[/tex]
Total outcomes:
Two movies from a set of 1. So
[tex]T = C_{9,2} = \frac{9!}{2!(9-2)!} = 36[/tex]
Probability:
[tex]p = \frac{D}{T} = \frac{1}{36} = 0.0278[/tex]
1/36 = 0.0278 = 2.78% probability that you guess the summer's top two must see movies if you randomly guess
Answer:
1.39%
Step-by-step explanation:
This is a permutation problem because order matters.
There are 9! ways to rank the summer's must-see movies.
There are (9−2)!=7! ways to choose two movies as the top two must-see movies.
P = 7!/9! = 1/72 = 0.0139
To express our answer as a percent, we multiply by 100:
0.0139 x 100 = 1.39%
Help plssssss I’ll boost u in thingy
Answer:
137.67
Step-by-step explanation:
hello !
first, we find the midpoint of each interval in the score column (you can look for it by adding the two numbers and then dividing it by 2). then, we multiply the midpoint to the frequency:
1 - 7 is 4 = 4 * 17 = 68
8 - 10 is 9 = 9 * 15 = 135
11 - 15 is 13 = 13 * 13 = 169
16 - 20 is 18 = 18 * 6 = 108
23 - 35 is 29 = 29 * 6 = 174
36 - 50 is 43 = 43 * 4 = 172
now, we look for the mean, which we get by adding the sums and dividing the total with 6.
[tex]\frac{68+135+169+108+174+172}{6} = 137.6666667[/tex] or, when rounded to two decimal places, is equal to 137.67.
Complete the solution of the equation. Find the value of y when x equals 2. -8x - 5y = -1 Enter the correct answer. DOA DONE ?
Answer: -3
Step-by-step explanation:
-8x - 5y = -1
-8(2) -5y = -1
-16 -5y = -1
-5y = 15
y = -3
4. A regular hexagon is shown below. Find the value of x. (11x + 21)
Answer:
We need the picture
Step-by-step explanation:
What is the slope of a line that passes through (-4, 8) and (3, -6)?
a.1/2
b.-2
c.-1/2
d.2
[tex]m=\frac{8-(-6)}{-4-3}=\frac{14}{-7}=-2[/tex] so B.
Hope this helps.
Will give BRAINLIEST
Answer:
Y=4x
Step-by-step explanation:
Answer:
1/4 per hour
Step-by-step explanation:
1 bracelet in 4 hours
1 divided by 4 = 1/4
1/4 bracelets per hour
a triangle has vertices A(2,6), B(-2,8) and C(-1, 0). a. show that the triangle I a right-angled triangle. b. calculate the area of the triangle.
Answer:
122122
Step-by-step explanation:
Proszę o jak najszybszą odpowiedź
Answer:sorry I don’t speak proeze najsztbsza but do you know the way
Step-by-step explanation:
