Answer:
The estimate for the proportion of Americans over 33 who smoke is 0.28.
Step-by-step explanation:
Proportion of Americans over 33 who smoke.
Number who smoke divided by the size of the sample.
In this question:
Sample of 1267.
913 don't smoke, so 1267 - 913 = 354 smoke. Then
[tex]p = \frac{354}{1267} = 0.28[/tex]
The estimate for the proportion of Americans over 33 who smoke is 0.28.
Tricia made a 55% on her science test. If she got 11 problems correct, how many questions were on the test?
Answer:
20 questions
Step-by-step explanation:
20 · 0.55 = 11
Keenan scored 80 points on an exam that had a mean score of 77 points and a standard deviation of 4.9 points. Rachel scored 78 points on an exam that had a mean score of 75 points and a standard deviation of 3.7 points. Find Keenan's and Rachel’s z-scores, to the nearest hundredth.
Answer:
Keenan's z-score was of 0.61.
Rachel's z-score was of 0.81.
Step-by-step explanation:
Z-score:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
Keenan scored 80 points on an exam that had a mean score of 77 points and a standard deviation of 4.9 points.
This means that [tex]X = 80, \mu = 77, \sigma = 4.9[/tex]
So
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{80 - 77}{4.9}[/tex]
[tex]Z = 0.61[/tex]
Keenan's z-score was of 0.61.
Rachel scored 78 points on an exam that had a mean score of 75 points and a standard deviation of 3.7 points.
This means that [tex]X = 78, \mu = 75, \sigma = 3.7[/tex]. So
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{75 - 78}{3.7}[/tex]
[tex]Z = 0.81[/tex]
Rachel's z-score was of 0.81.
A building in a city has a rectangular base. The length of the base measures 70 ft less than twice the width. The perimeter of this base is 820 ft. What are the dimensions of the base?
Answer:
160 ft, 250ft
Step-by-step explanation:
Rectangular base:
Width = w
length =2w - 70
Perimeter = 820 ft
2*(length + width) = 820
2*(2w - 70 + w ) = 820
2 *(2w + w - 70) = 820 {Combine like terms}
2* (3w - 70) = 820
3w*2 - 70*2 = 820
6w - 140 = 820
6w = 820 + 140 {Add 140 to both side}
6w = 960 {Divide both sides by 6}
w = 960/6
w = 160 ft
length = 2*160 - 70
= 320 - 70
= 250 ft
User averysmartperson is helping with this question.
Answer:
[tex]x^2 + (y-60)^2 = 30,625[/tex]
Step-by-step explanation:
There are 42 carts, so there is 42 spaces in between them; if one of those spaces are 25pi/3 feet long, then 42 of them would be 25*42*pi/3 = 350pi (Perfect! no fractions)
350pi is the circumference. Now if we plug that into the circumference equation we get:
C = 2pi*r
350pi = 2pi*r
Divide both sides by pi to get rid of it
350 = 2r
Divide both sides by 2
r = 175 feet
So the new equation to graph it is:
x^2+y^2 = 175^2 = 30,625
We also know that the center of the Ferris wheel has to be at least 60 feet from the ground. Since the radius is more than that, a good bit of the Ferris wheel has to be underground OR we can make it higher (keyword: at least) if we want it to be above ground. I'll do the equation for underground since it more closely represents the question.
subtracting a number from y, shifts the graph up that much so:
[tex]x^2 + (y-60)^2 = 30,625[/tex]
I can't really draw it electronically but I can graph it:
Hector puts together two tables to make a long table for a class picnic.
One table is 7 feet 7 inches long. The other table is 6 feet 9 inches long.
What is the total length of the two tables?
Answer: 14 feet 4 inches
Step-by-step explanation:
Given: The length of the first table = 7 feet 7 inches
The length of the second table = 6 feet 9 inches
The total length of two tables = 7 feet 7 inches + 6 feet 9 inches
= (7+6) feet (7+9) inches
=13 feet 16 inches
Since 1 feet = 12 inches
The total length of two tables = 13 feet+ (12 inches +4 inches)
=13 feet +( 1 feet +4 inches)
= 14 feet 4 inches
Hence, the total length of the two tables = 14 feet 4 inches
What percent of values is between the first and third quartiles?
its question 4
Answer:
answer
Step-by-step explanation:
5%
.......................
write an equivalent expression for -5 ( 3 - 2x ) , if you help I’ll sent 5$ via PayPal or whatever you use. Thanks.
Answer: 10 x - 15
Step-by-step explanation:
Find the area of the shape shown in the diagram below (dimensions are in ft):
Answer:
where is the picture???????????
This data is an example of
A. a linear function
B. a nonlinear function
C. neither a linear nor nonlinear function - it is not a
function at all
Answer:
a nonlinear function I think because it's a quadratic one?? kinda
I’ll give points + brainslist, if you don’t know don’t bother answering (:
Mike borrowed some money for 2 years at 8% simple interest. If he had to pay back a total of $4060 how much did he borrow, how much did he originally borrow?
Answer:P = $ 25,375.00
Step-by-step explanation:
P = 4060 / ( 0.08 × 2 ) = 25375
P = $ 25,375.00
what is 3/7 divided by 2/5?
Answer:
1 1/14
you have to multiply by the reciprocal of the second fraction
please help meeeeeeeeeeeeeeeee
Answer:
hi
Step-by-step explanation:
i think so...
[tex]\pi \times {r}^{2} \times \frac{h}{3} \\ 3.14 \times 3.5 \times \frac{9}{3} \\ = 32.97[/tex]
hope it helps
bye
What is the volume of the figure?
HELP
Answer:
the anser is 88 i think
Step-by-step explanation:
beacuse 5.8=40
5.8=40
1.8=8
or it could be
264
Step-by-step explanation:
Figure on the left: 5x5x8 = 200
Figure on the right: 8x1x8 = 64
200+64=264
Answer:
264
Step-by-step explanation:
Figure on the left: 5x5x8 = 200
Figure on the right: 8x1x8 = 64
200+64=264
How many gallons are in of a 7-gallon container of milk?
Answer:
7
Step-by-step explanation:
Uhh 7 divided by 1 is 7?
Answer:
7
Step-by-step explanation:
There are 7 gallons in a 7-gallon container of milk.
A triangle has vertices at B(-3,0), C(2, -1), D(-1,2). Which series of transformations would produce an image with vertices B"(4,1), C"(-1,0), D"(2, 3)?
O(x, y) - (X. -y). (x, y) (x + 1. y + 1)
O(x, y) - (-x, y). (X. y) (x + 1, y + 1)
O(x, y) - (x, -y), (x, y) (X + 2, Y + 2)
O(x, y) - (-x, y), (x, y) + (x + 2, Y + 2)
Answer:
(b) (x, y) ⇒ (-x, y); (x, y) ⇒ (x + 1, y + 1)
Step-by-step explanation:
A graph shows the image is consistent with reflection over the y-axis
(x, y) ⇒ (-x, y)
and translation right 1, up 1
(x, y) ⇒ (x +1, y +1)
These transformations are listed in the second choice.
__
In the attachment, the original image is blue, the reflected image is purple, and the final translated image is red.
find the slope based on the date below
x: -4, 0, 4 8
y: 3, 8 13 18
HELPPP QUICKK PLZZ
Answer:
The slope is [tex]\frac{5}{4}[/tex]
Step-by-step explanation:
Slope of a dataset:
The slope of a dataset, having two points, is given by the change in y values divided by the change in x values
In this question:
Two points:
x = 0, y = 8
X = 4, y = 13
The slope is:
[tex]m = \frac{13 - 8}{4 - 0} = \frac{5}{4}[/tex]
The slope is [tex]\frac{5}{4}[/tex]
any app where I can take pics of WORD PROBLEMS and get answers
Answer:
well I know one you can try SOLVEITNOW
you can also try MICROSOFT MATH SOLVER
or CYMATH-MATH PROBLEMS SOLVER
A quart and a liter of the same kind of drink are on a shelf and are the same price. Which one should you pick if you are really thirsty?
quart
doesn't matter - they are the same amount
liter
What’s the answer to this math problem
Answer:
The answer is C
Step-by-step explanation:
48/112 = 0.4285
convert and round it
0.4285 = %42.9
The percent of the 7th grade students were in favor of wearing school uniforms is 42.9%.
From the given table,
7th grade students who are in favor of wearing uniform = 48
Total 7th graders = 112
So, the percent of the 7th grade students were in favor of wearing school uniforms
= 48 / 112 x 100
= 12 / 23 x 100
= 42.85%
Learn more about Percentage here:
https://brainly.com/question/32197511
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Find the mode, median, mean, lower quartile (Q1), upper quartile (Q3), minimum, maximum, range, interquartile range, and standard deviation for the data set. Then create a box and whisker plot. Be sure to show work for finding the lower and upper fence and then plot any possible outliers appropriately. Round answers to the nearest hundredth.
1) The following data is the points that
Melody scored in her first 13 games of her
basketball season.
16, 12, 14, 9, 8, 12, 14, 28, 15, 18, 7, 14, 6
Answer is in a photo. I can only upload it to a file hosting service. link below!
bit.[tex]^{}[/tex]ly/3a8Nt8n
Please answer asap. NO SCAM LINKS.
Without solving, identify whether each of the following equations has a unique solution, no solution, or infinitely many solutions.
3.2 + 6 = -8
0 1 solution
O No Solution
O Infinite solutions
Answer:
No solution
Step-by-step explanation:
a number divided by 22 .?
A)22/x, B)22+x, C)x/x-22, D)x/22
Answer:
D
Step-by-step explanation:
Let the number be n. Then "a number divided by 22" would be n/22 (Answer D)
The number divided by 22 can be written as x / 22, so option D is correct.
What is division?It is a fundamental operation in mathematics where you divide a number into smaller parts.
Given:
A number divided by 22,
Here, the divisor = 22
Assume the number is x
Then, dividend = x
Thus, expression can be written as,
dividend/divisor = x / 22
To know more about division:
https://brainly.com/question/27566440
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what are 3 different equations that have x=5 as a solution
Answer:
1) x+y=50
2) 5x+2y=200
3)2x+4y=200
Hope this helps!
Answer:
x+3=8, 2x-8=2, and 4x-4=16
Step-by-step explanation:
Im stuck only answer if your 100% sure. Will Mark Brainliest. ( Look at the picture for the problem.
Answer:
[tex]3x^2(5y^2-xy+25x^2)\\[/tex]
Step-by-step explanation:
[tex]15x^2y^2-3x^3y+75x^4\\\\3x^2(5y^2-xy+25x^2)\\[/tex]
3x² is the only facor with all 3 of the terms.
I’m dead for not knowing this
The correct answer is A: -2 + 2 = 0
What is the slope of y = x + 5?
Answer: look at the picture and I can’t solve y for you.
Step-by-step explanation: Hope this help :D
SRRY BUT PLEASE HELP What percent is equivalent to 1/25?
4%
5%
20%
25%
Answer:
4%
Step-by-step explanation:
1/25 is equal to 0.04
To convert a decimal to a percent... move the decimal 2 spots to the right
This will give you 4%
Hope this helps!
HOW TO CONVERT 1/25 TO A PERCENTAGE?
To write 1/25 to a percentage, you must remember that 1 equals 100% and that what you must do is multiply the number by 100 and add the symbol% at the end.
[tex] \bold{1 /25 * 100 = 0.04 * 100 = 4\%}[/tex]
And finally we have:
[tex] \bold{1/25 \: a \: percentage equals 4\%}[/tex]
solve the quadratic equation
y^2 −10y+21=0
y=?
Answer: y = 3 or y=7
Step-by-step explanation:
[tex]y^{2} -10y+21[/tex]
what 2 factors of 21 can equal 10 when added together (1*21- no 3*7- yes)
Factor
[tex](y-3)(y-7)[/tex]
y-3=0
y=3
or y-7=0
y=7