The question is incomplete. The complete question is :
Members of a research team are considering three studies related to sleep and learning. The first study involves comparing the scores on a post-study test of learning from two groups of randomly chosen adults, with one group getting at least 7 hours of sleep per night for a week and the other group getting at most 6 hours of sleep per night for a week. A second study involves asking a random sample of students at a large university to report the average number of hours of sleep they get each night and their college grade point average. A third study involves asking a random sample of high school students in a large school district whether they feel they get enough sleep to stay alert throughout the school day.
Which study appears to look for an association between two variables without actively manipulating either one. What are those variables ?
Solution :
The second study in the context is involved in asking for a random sample of the students at an university to provide a report the average hours of sleep that everybody get each night and also the grade point of their college appears for association between these two variables without actively changing either of one.
These variables are the grade point average of the students and the numbers of hours of sleep.
What is the answer for, A metal bar 8.15 ounces 93% of the bar is sliver. How many ounces of silver are in the bar? ( round to the nearest thousandth)?
Answer:
7.580 ounces
Step-by-step explanation:
The question is asking how many ounces of silver are in the bar. We know that 93% of the bar is silver. The bar is 8.15 ounces. This means we need to find 93% of 8.15. Let's set up an equation.
93% of 8.15
93/100 • 8.15
0.93 • 8.15
= 7.5795
Round to the nearest thousandth.
7.580 ounces
Hope this helps!
1 pts The function f(x) = 12,900(0.40)x models the population of ants in a house x days after their discovery. Which statement describes the population of ants?
Answer:
f(x) = 500 • 1.1x
Step-by-step explanation:
To solve the question, we need to understand that:
- The population of ants is going to increase with time as they mate and have a population positive growth rate.
- The initial number of ants is 500.
- The rate at which it increases will be multiplied with x months
We will work our way out by removing the wrong answers first
Since,
The population cannot be decreased so we can neglect the last two options involving 0.9 as it will result in a decrease in the population.
Now we are left with two options:
a) f(x) = 500 • 1.1x
b) f(x) = 1.1 • 500x
Since in the option (b) , 500 is multiplied with x , it is not possible as 500 is a constant initial amount and not a factor of growth of population. The growth factor is supposed to be multiple of x months.
So, the correct answer is f(x) = 500 • 1.1x
pls help me I have no idea what I'm doing
Answer:
3.2mm ^3
Step-by-step explanation:
First find the scale factor to get the height of the smaller figure
SF= 1/5 or 0.2
Then use the Volume equation for triangular pyramid 1/3*(base area)*(height)
Your equation should look like this:
1/3 (4)(2.4)
9.6/3
Volume= 3.2 mm ^3
A triangle has angles measuring 18.3° and 102.5°. What is the measure of the third angle?
Answer:
59.2
Step-by-step explanation:
A triangle equals a total of 180
102.5 + 18.3 = 120.5
180 - 120.5
= 59.2
A video game that normally sells for $80 is on sale for $68. What is the percent of discount for the sale price?
A) 18%
B) 17%
C) 15%
D)12%
Answer:
C
Step-by-step explanation:
68 - 80 / 80
= - 12 / 80
= - 3 / 20
= - 15%
The solution shown for the equation is
incorrect. What is the correct solution? What is the error?
-3(6-r) = 9
- 18 - 3r = 9
- 3r = 27
9
The solution is
(Type the value of r.)
Pleaseeee help ASAP
Will mark brainliest
Answer:
-3(6-r) = 9
- 18 - 3r = 9 incorrect: should be -18 +3r = 9
- 3r = 27 incorrect: should be 3r = 27
9 actually correct: r = 9
find the common ratio of 80, 20, 5
Answer:
The common ratio of the following sequence : 80, 20, 5,... is 1/4. Common ratio = 5/20 = 20/80 = 1/4
Step-by-step explanation:
SOMEBODY HELP ME PLEASEEEEEEE I HAVE 9 more
Answer:
a. every fifth student that enters her classroom
Step-by-step explanation:
I am not for sure, it makes the most sense though because her honors class is all 3 classes, and boys in each of her classes could be biased
F(x)=-x^2+8x-2 what is the range of the function?
Answer:
Range: ( − ∞ , 14 ]
Step-by-step explanation:
the graph below is the solution for which set of inequalities
Plot the data for the functions ƒ(x) and g(x) on a grid.
Answer:
I really dont know
Step-by-step explanation:
Answer:
Would like to know where the functions are. Please help
Solve the inequality for x
8^x>24
Answer:
Step-by-step explanation:
Remark
I hope you have some idea how to make your calculator use logs. This problem is impossible without being able to take the log of each side.
Solution
log(8)^x > log 24 Logs lets you bring down x and multiply it by log24
x log 8 > log 24 Be careful what you do next. Don't use log 3
x > log(24)/log(8)
x > 1.3802/0.9031
x>1.5284
As wrong as this may look, it is correct.
Check it
8^1.5284 = 24.00395
The difference is that 1.5284 has been rounded just a slight bit.
find the product
(n+8)(m-2)
Answer:
nm - 2n + 8m - 16
Step-by-step explanation:
(n + 8) (m - 2)
nm - 2n + 8m - 16
Please help solve correctly. NO links or files. Correct answers only if not report. I will even give an additional 10 if correct.
Answer: 228 cm
hope this helped :)
The ratio of the number of games won to the number of games lost (no ties) by the Middle School Middies is
11/4. To the nearest whole percent, what percent of its games did the team lose?
Answer:
27%
Step-by-step explanation:
The ratio means that for every 11 games won, 4 are lost, so the team has won 11x games, lost 4x games, and played 15x games for some positive integer x. The percentage of games lost is
4x / 15x * 100 = 4/15 * 100 = 26.6666 = 27%
A percentage is a way to describe a part of a whole. To the nearest whole percentage, the percentage of games lost by the team is 27%.
What are Percentages?A percentage is a way to describe a part of a whole. such as the fraction ¼ can be described as 0.25 which is equal to 25%.
To convert a fraction to a percentage, convert the fraction to decimal form and then multiply by 100 with the '%' symbol.
Given the ratio of the number of games won to the number of games lost is 11/4, therefore, the total number of games played by the team is 15(11+4).
Now, the percentage of games lost by the team is,
4/15 × 100% = 26.6667% ≈27%
Hence, To the nearest whole percentage, the percentage of games lost by the team is 27%.
Learn more about Percentages:
https://brainly.com/question/6972121
#SPJ2
Create 2 equivalent expressions
4(2x1.5x)+10
ANS: 2 (12e^2inx^3prs^3 o + 10
Step-by-step explanation:
What's the word called for when people don't believe in ghosts or any type of things , there was a specific word !
Answer:
Maybe a skeptic?
Step-by-step explanation:
skep·tic:
1. a person inclined to question or doubt accepted opinions.
What is the slope of the line that passes through the points (5, 6) and (5,9)
Answer:
undefined or no solution
Step-by-step explanation:
it repeats the same x-value
Answer:3
Step-by-step explanation:
9-6
over
6-5
=3/1
simplify
m=3
A phone company offers a mobile phone plan for a monthly fee of $19.95 plus $0.05 for each minute used during the month. Which equation below BEST represents the cost, y, for one month when x minutes are used?
Answer:
y = 19.95 + .05x or y = .05x + 19.95
Step-by-step explanation:
Gina is building a rectangular prism out of sugar cubes for her art class project. She started by drawing a diagram of the rectangular prism that is 4 cubes high, 4 cubes long and 2 cubes wide. How many cubes does she use to make the prism?
The rectangular prism is made up of the dimensions
Lenght = 4 cubes
Width = 2 cubes
Height = 4 cubes
The total number of cubes she needs shall be derived as number of cubes along the lenght multiplied by number of cubes along the width, and then multiplied by number of cubes along the height. Therefore, she would have:
[tex]volume = l \times w \times h \\ volume \: = 4 \times 2 \times 4 \\ volume = 32 \: cubes[/tex]
Therefore, She need 32 cubes to make the prism.
yes or no? help me out thank you so much whoever does:))
Answer:
Yes
Step-by-step explanation:
The bottom left corner is a right angle
steve is rolling a six-sided number cube. what is the probability of the cube landing on a six?
Answer:
1/6
Step-by-step explanation:
Space = {1,2,3,4,5,6}
n(S) = 6
A = Event of getting 6 = {6}
n(A) = 1
P(getting six) = n(a)/n(S) = 1/6
Which function equation is represented by the graph
Answer:
you need to put a picture
Step-by-step explanation:
:)
PLEASE HELP
4. Is this a right triangle? Side lengths of 4 in., 6 in., and 9 inches.
O Yes
Ο Νο
Answer:
yes
Step-by-step explanation:
:)
Answer:
no
Step-by-step explanation:
The sides of the given lengths will form a right triangle if they satisfy the Pythagorean theorem.
c² = a² + b²
9² = 4² +6²
81 = 16 +36 . . . . . not true
These side lengths do not form a right triangle. (They form an obtuse triangle.)
what is the least common denominator 2 and 7?
Answer:
14
Step-by-step explanation:
write down the temperature which is 5 degree below -2
Answer:
-7
Step-by-step explanation:
-2 - 5 = -7
Answer:
-7 degree
Step-by-step explanation:
What is the volume of the prism, in cubic centimeters?
please help me
Answer:
4cm ×cmohx9ufochohcohcohc
1) Mary and Frank have two bags in front of them. Mary's bag has 4 Inarbles; blue, yellow, red
and green. Frank's bag has 3 marbles; purple, orange, and pink. They will pick from their bag
at the same time. What is the probability of Mary selecting red from her bag and Frank selecting
purple from his bag?
hi
Mary has 1/4 to pick red and Frank 1/3 to pick purple
both event at the same time : 1/4*1/3 = 1/12
HELP!!!PLS!!!NOW!!!FAST!!!ASAP!!!
Answer:
lol what
Step-by-step explanation:
Answer:
:)
Step-by-step explanation:
If the width of a pool is 60 feet and the perimeter is 200 feet, how long is the pool?
A. 140 feet
B. 120 feet
C. 40 feet
D. 50 feet
Answer:
140
Step-by-step explanation:
200-60 = 140
Answer:
c
Step-by-step explanation:
Substitute the values in the problem to get, (200) = 2(60) + 2W. Solve for W to get 200 = 120 + 2W. Subtract 120 on both sides to get 80 = 2W. Divide by 2 on both sides to get 40 = W or a width of 40 feet.
hope that helped you.
