Answer:
(a) An investigation of whether taking aspirin reduces one’s chance of having a heart attack.
Experimental
Neither blind nor double-blind (unless a placebo is being administered to some participants).
(b) An investigation of whether babies born into poor families (family income below $25,000) are more likely to weigh less than 5.5 pounds at birth than babies born into wealthy families (family income above $65,000).
Observational
There is no blinding issue here.
(c) An investigation of whether the size of the midsagittal plane of the anterior commissure (a part of the brain) of a man is related to the sexual orientation of the man.
Observational
There is no blinding issue here.
Step-by-step explanation:
An observational study happens where some variables are observed to determine their correlations. On the other hand, in experimental studies, the researcher controls certain variables to determine causality. Therefore, an experimental study provides evidence of cause and effect, like in (a) above.
5x-(x+3)=1/3(9x+18)-5
Answer: x=4
Step-by-step explanation:
A line passes through the point (-2, – 7) and has a slope of 5/2
Write an equation in slope-intercept form for this line.
Answer:
y= (5/2)x+2
Step-by-step explanation:
muggsy weigh 5/7 as much as his friend bruno. bruno weighs 125 lb. how many does muggsy weigh?
Answer:
Muggsy weighs 89 2/7 lbs.
Which expression has the same value as -18÷(-9)?
A-18-2
B-12÷(-3)
C-10÷5
D-6÷(-4)
Answer:
None of the followingStep-by-step explanation:
-18 ÷ (-9) = 18 ÷ 9 = 2
A. -18 - 2 = -(18 + 2) = -20 ≠ 2
B. -12 ÷ (-3) = 12 ÷ 3 = 4 ≠ 2
C. -10 ÷ 5 = - 2 ≠ 2
D. -6 ÷ (-4) = 6 ÷ 4 = 1.5 ≠ 2
Shonda painted 3 walls in her home. She used 34 of her paint. She used the same amount of paint on each wall.
How much of her paint was used on each wall?
Drag and drop the correct answer to complete the statement.
Shonda used ________ area of her paint on each wall.
Please help me
Answer:
en que exactamente necesitas mi ayuda????
Step-by-step explanation:
???????
Answer: Shonda used 1/4 of her paint on each wall.
Step-by-step explanation:
If she used 3/4 of her paint on 3 walls, then each wall used up 1/4 of her paint.
3/4 divided by 3 = 1/4
Hope this helps!
You decide to purchase a bond for $500. It pays 5% simple interest per year and matures in 5 years. How much interest will you earn once the bond matures? Round your answer to the nearest dollar.
Do NOT round until you have calculated your final answer.
Answer:
$625
Step-by-step explanation:
You start with $500
The interest per year is 5% or 500 x 0.05 = $25
If it matures 5 years and each year has an increase of $25 then
Year 1 - $525
Year 2 - $550
Year 3 - $575
Year 4 - $600
Year 5 - $625
Answer:
Step-by-step explanation:
We express the interest rate r in decimal form, so we have r=5%=5100=0.05. The principal is P=500 and the time in years is t=5. So, the interest is I=Prt=(500)(0.05)(5)=$125. The interest earned is $125.
Question 2 of 5
Select the story problem that this division problem represents.
3
4
1
5
A. A mosaic has an area of square foot and a width of foot.
What is the length of the mosaic?
B. A piece of wrapping paper is yard wide and yard long. What is
the area of the wrapping paper?
C. The area of a wetland is į square mile, and it is mile in length.
How wide is the wetland?
D. A whiteboard is meter long and has an area of 1 square meter.
How wide is the whiteboard?
Answer:
The answer is below
Step-by-step explanation:
A) Given that the area of the square a square foot = 1 ft², the width = 1 foot
Area = length × width
1 ft² = length × 1 ft
Length = 1 ft²/ 1 ft = 1 ft
B) Given that length of wrapping paper = 1 yd, width = 1 yd.
The area of the paper = length × width = 1 yd × 1 yd = 1 yd²
C) Given that the area of the wetland is a square mile = 1 mile², the length = 1 mile
Area = length × width
1 mile² = 1 mile × width
width = 1 mile²/ 1 mile = 1 mile
D) Given that the area of the square a square meter = 1 m², the length = 1 meter
Area = length × width
1 m² = 1 m × width
width = 1 m²/ 1 m = 1 m
Raise to the power: (–2abx)4
Answer:
(16a^4b^4x^4)
Step-by-step explanation:
Guys pls help if I don’t know if I’m correct
Answer:
Yes u are correct
Just the picture, Geometry.
∠2 = ∠3 ( vertically opposite angles )
= 112° = 112°
= ∠3 = ∠7 ( corresponding angles )
Therefore , m∠7 = 112° .
The slope of AB is 6/5 if point A is (3,y) and point B is (-2,-1) find the value of y
Little Bo Peep needs to buy 10 new sheep.
Farm M: one sheep costs $20
Farm Q: Set of 5 sheep costs $75.
How much will it cost Little Bo Peep to buy 10 sheep from Farm M?
Answer:
200$
Step-by-step explanation:
10 TIMES 20 IS 200
I need to solve for n.
Me puede de resolver tengo q presentar eso mañana
Answer:
180/3=60
60/3=20
20/3=6.667(redondeado)
6.667/3= 2.222(redondeado)
2.222/3=0.741(redondeado)
0.741/3=0.247
2x+3=10
Simplify to the nearest term.
Answer:
x = 4.
Step-by-step explanation:
2x + 3 = 10.
Simplify 3 - 10 = -7.
2x = -7.
Divide 2x = -7 to 4.
Hope this helps!
Have a good day ma'am/sir.
Be safe!
lincoln middle school has a total of $200 to spend on notebooks and tablets
Answer:
Oh um ok. Is there supposed to be like a 2nd part to this??
Step-by-step explanation:
The price for a new car, without sales tax, is
$18,900. The buyer must also pay a 5% state
sales tax. What is the cost of the car includ-
ing the sales tax?
Answer:
Step-by-step explanation:
18900 divided by 10 = 1890
1890 divided by 2 is 945
945 is 5 percent of 18900
18900 + 945 = 17955
Answer = 19845
There are 20 students in a class and 70% of these students passed their Biology test.
What number of these students passed their test? Round your answer to the nearest whole
number if necessary.
Answer:
The answer is 14 students.
Step-by-step explanation:
70% of 20 = 14
find the slope and y- of the table
Answer:
y = (3/2) x +6
Step-by-step explanation:
The y-intercept is clearly at y = 6 point (0, 6) of the table.
The slope can be calculated using any two pairs, for example (-4,0) and (-2, 3)
slope = (y2 - y1)/(x2 - x1) = (3 - 0) / (-2 + 4 ) = 3/2
Then the equations of the line in slope y-intercept form is:
y = (3/2) x +6
PLEASE HELP!
How do you calculate the cost of repaying a car loan
Answer:
Multiply and divide
Step-by-step explanation:
Answer:
To determine how much you can expect to pay in finance charges over the life of the loan, multiply the Monthly Payment Amount by the Number of Payments, minus the Amount Borrowed. This should give you the Total Amount of Finance Charges that you can expect to pay.
Step-by-step explanation:
Hope This Helps probably not but here!
spend 54.49 and 79.99. how much in total
Answer:
25.5
Step-by-step explanation:
Answer:2.25
Step-by-step explanation:
Samantha is training for a race. The distances of her training runs form an arithmetic sequence. She runs 1 mi the first day and 2 mi the seventh day.
a. What is the explicit definition for this sequence?
b. How far does she run on day 19?
Solve this equation 6(2b + 12)
Type the correct answer in each box. Use numerals instead of words. For this question, any answer that is not a whole number should be entered as a fraction in simplest form, using / as the fraction bar, or as a decimal number rounded to the hundredths place. The point P has a value of and is represented with a point on the top number line. The point R has a value of and is represented with a point on the bottom number line. If the value of point P is and |Q| is , then the greatest value of P + Q is , and the least value of P + Q is . If the value of point R is and |S| is 2, then the greatest value of R + S is , and the least value of R + S is . Reset Submit
Answer:
Step-by-step explanation:
Since we are not given the value of P, |Q|, R and S, we can as well assume values for them for the sake of this question.
Let P = 5, |Q| = 6, R =7 |S| = 2
Note that since Q and S are in modulus sign, they can return both positive and negative values.
P+Q = 5 + 6 (note that the positive value of Q is used since we need the greatest value of P+Q)
P+Q = 11
Hence the greatest value of P+Q is 11
For the least value of P+Q, we will use the negative value of Q as shown
P+Q = 5+(-6)
P+Q = 5-6
P+Q = -1
Hence the least value of P+Q is -1
Similarly:
R+S = 7 + 2 (note that the positive value of S is used since we need the greatest value of R+S)
R+S = 9
Hence the greatest value of R+S is 9
For the least value of R+S, we will use the negative value of S as shown
R+S = 5+(-2)
R+S = 5-3
R+S = 2
Hence the least value of P+Q is 2
NOTE THAT THIS ARE ASSUMED VALUES. ALL YOU NEED IS TO PLUG IN THE VALUES OF P, Q and R THAT YOU HAVE IN CASE THE VALUES DIFFERS.
8) There are 6 cups of sugar in 5 batches of cookies. How many cups are in 1 poin
1 batch?
Answer:
6/5 cupsStep-by-step explanation:
[tex]6 \:cups = 5\:batches\\x\:cups = 1\:batch\\\\Cross\:Multiply\\\\5x = 6\\\\Divide\:both\:sides\:of\:the\:equation\:by\:5\\\\\frac{5x}{5} =\frac{6}{5} \\\\x = 1\frac{1}{5}[/tex]
What is the product of-3 and-13? Enter your answer as a mixed number, in simplified fom, in the box
Answer:
39
Step-by-step explanation:
-3x(-13) = 39.
If this question was asking for something different I apologize.
what is the quotient of
2 1/2 ÷ (-1 3/4)
enter your answer as a mixed number in simplified form
Answer:The exact form is -10/7 the simplified form is -1 3/7
Step-by-step explanation:
wilma buys a new game that is priced at 43.89. She gets successive discounts of 15% followed by 5% off on the game. The purchase price of Wilma's game is what percentage of the original price?
Answer:
C
Step-by-step explanation:
Edge 2020
Answer:
c edg
Step-by-step explanation:
how math is used in technology
Answer:read the explanation
Step-by-step explanation:
The processors that power computers are able to perform calculations quickly, and the calculations are performed using Boolean algebra. People generally solve math problems using a base-10 number system. Boolean algebra relies on base-2 math, in which all numbers are represented using ones and zeros.
In addition to calculating basic math problems, however, computers also use Boolean logic. This logic, which is rooted in discrete mathematical principles, allows computers to solve problems that require making logical decisions. Boolean algebra and logic combine to make sophisticated devices; self-driving cars, for example, use the input calculated from digital cameras to make decisions about how to navigate.
A particle travels along the x axis such that it’s position at time t is given by the function x(t)=2t+t. What is the average speed of this particle over the interval 2
The required average speed of this particle over interval 2 is less than or equal to t which is less than or equal to 10 is 32 meters/second.
Given that,
A particle travels along the x-axis such that its position at time t is given by,
Function; [tex]\rm x(t)=2t^2+t[/tex]
We have to find,
What is the average speed of this particle over interval 2 is less than or equal to t which is less than or equal to 10?
According to the question,
The position of the particle is given by,
[tex]\rm x(t)=2t^2+t[/tex]
The average speed of this particle is determined by differentiating the function with respect to x,
[tex]\rm \dfrac{dx}{dt} = \dfrac{d(2t^2+t)}{dx}\\\\\dfrac{dx}{dt} = 4t + 1 \\\\v(t) = 4t+1[/tex]
Then,
The average speed of the particle over interval 2 is,
[tex]\rm v(t) = 4t+1 \\\\v(2) = 4(2)+1\\\\v(2) = 8+1 \\\\v(2) = 9 \ meter \ per \ second[/tex]
And the average speed of the particle over interval 10 is,
[tex]\rm v(t) = 4t+1 \\\\v(10) = 4(10)+1\\\\v(10) = 40+1 \\\\v(10) = 41 \ meter \ per \ second[/tex]
Therefore,
The average speed of this particle over interval 2 is less than or equal to t which is less than or equal to 10 is,
[tex]\rm v(t) = v(10)-v(2)\\\\v(t) = 41-9\\\\v(t)= 32 \ meter \ per \ second[/tex]
Hence, The required average speed of this particle over interval 2 is less than or equal to t which is less than or equal to 10 is 32 meters/second.
For more details refer to the link given below.
https://brainly.com/question/2292357
Answer:
Very basically, the answer is 3
Step-by-step explanation:
Know this cause Edge 2023