Answer: The answer is 0.38
Step-by-step explanation:
Well, everything is given, as stated in the question "the probability that a student is a girl and in an art class is 0.20."
It's given that the probability that a student is a girl is 0.52.
However, in the question, it said that it's given a student is a girl.
You have the probability that a student is a girl and in art class, so you need to find what 0.52 was multiplied by which would be the probability of someone being in art class. Knowing this you can do 0.20 / 0.52 to get 0.38.
Find the area of a sector, whose perimeter is 40 cm, and the radius is 8 cm.
Answer:
96 cm²
Step-by-step explanation:
From the question,
s = (2πr∅/360)+2r................. Equation 1
Where s = Perimeter of a sector, r = radius, ∅ = angle subtend by the sector at the center of the circle.
Given: s = 40 cm, r = 8 cm
Constant : π = 3.14.
Substitute into equation 1 and solve for ∅
40 = (2×8×3.14×∅/360)+(2×8)
40 = (50.24∅/360)+16
40-16 = 50.24∅/360
50.24∅/360 = 24
50.24∅ = 24×360
50.24∅ = 8640
∅ = 8640/50.24
∅ = 171.97°
Area of a sector (A') = ∅πr²/360
A' = 171.97×3.14×8²/360
A' = 95.997
A' ≈ 96 cm²
Please help I’ll mark you brainliest
Answer:
The perimeter is 25.
Step-by-step explanation:
Darling, I'm not always accurate but I hope this helps you with math!
kim's scores in the diving competition were 7,2, 6.975, 8.0 and 6.96 what is her total score
decimal
Answer:
8.0
Step-by-step explanation:
Subtract.Write your answer as a fraction or a whole or mixed number. 10 1/3-3 2/3=
Answer:
as a mixed fraction 6 2/3, improper fraction 20/3
Help please look at the photo
Please Help!!!!!!!!!!
Answer: Yes, because there are at least two claims
Step-by-step explanation:
Ur welcome 3>
can u pls help solve by using trig
Answer:
32.485
Step-by-step explanation:
24+6root2
Please answer ASAP
Will give Brainleist
Answer:
51
Step-by-step explanation:
range = highest number - lowest number
54 - 3 = 51
What two numbers make on thousand
Answer:
500 and 500
Step-by-step explanation:
Please help me!!!!!!!!!!!!!!!!
Answer:
who where when what how?!!?
Step-by-step explanation:
A college-entrance exam is designed so that scores are normally distributed with a mean of 500 and a standard deviation of 100. You scored a 625. Calculate your z-score to the nearest hundredth (i.e. 2 decimal places).
z=
Answer: 1.25
Step-by-step explanation:
Given: A college-entrance exam is designed so that scores are normally distributed with a mean[tex](\mu)[/tex] = 500 and a standard deviation[tex](\sigma)[/tex] = 100.
A z-score measures how many standard deviations a given measurement deviates from the mean.
Let Y be a random variable that denotes the scores in the exam.
Formula for z-score = [tex]\dfrac{Y-\mu}{\sigma}[/tex]
Z-score = [tex]\dfrac{625-500}{100}[/tex]
⇒ Z-score = [tex]\dfrac{125}{100}[/tex]
⇒Z-score =1.25
Therefore , the required z-score = 1.25
FOR 58 POINTS!!!
Angle H is half as large as angle J. Angle J is one fourth as large as angle K. Angle K has a measure of 240 degrees. What is the measure of angle H?
Answer:
30
Step-by-step explanation:
Which expressions represent 1 more than the product of 5 and 2?
Help mark brainlist
Answer:
741.415866247
Step-by-step explanation:
10. Maddy has saved $55 from birthday money. She is earning $25 per week for babysitting her neighbors, which
she also saves. Which function can be used to nd a, the amount of money Maddy will have saved at the end of w
weeks of babysitting?
A. a =55w +25 B. a = 25w + 55 C. a = 55w + 80 D. a = 80w +55
Answer:
B
Step-by-step explanation:
because 25w is 25 dollars per week and you have to add the 55 dollars she earned which equals the total of money she will have.
sorry I'm not great at explaining lol
Pick me chose me love me NOW HELP ME WITH MATH
Answer:
Same
Step-by-step explanation:
Answer:
W=90
Step-by-step explanation:
THERES a box
There are 30 red marbles, 16 blue marbles, and 14 green marbles in a jar.
What is the probability of picking out a red marble without looking?
30%
50%
23%
0 27%
Answer:
B or 50%
Step-by-step explanation:
First, you add all of them together
30 + 16 + 14 = 60
Then you do the part/whole
30/60 = 1/2
1/2 = 50%
What is the area of this figure?
6mi
5mi
8mi
square miles
Answer:
6x5x8=240 square miles ([tex]240^2}[/tex])
3.4x=8.5
on a text plz answer
Answer:
x=.4
Step-by-step explanation:
Answer:
2.5
Step-by-step explanation:
Find the circumference and area of a circle with diameter of 18 inches. Use 3.14 for pi. Write your answer as decimals rounded to the nearest hundredth.
a. C = 56.52 in, A = 1017.36 in2
b. C = 56.52 in, A = 254.34 in2
c. C = 113.04 in, A = 254.34 in2
d. C = 113.04 in, A = 1017.36 in2
e. None of the above are correct.
Answer: b
Step-by-step explanation:
Radius = 9 inches, Pi= 3.14
Circumference = 2 x pi x radius = 2 x (3.14) x 9 = 56.52
Area = pi x radius x radius = (3.14) x 9 x 9 = 254.34
Answer:
Answer attached
Step-by-step explanation:
Annual starting salaries for college graduates with degrees in business administration are generally expected to have a population standard deviation of $3,000. Assume that a 95% confidence interval estimate of the population mean annual starting salary is desired. How large a sample should be taken if the desired margin of error is (a) [1 pt] $500
Answer:
A sample of 139 should be taken.
Step-by-step explanation:
We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:
[tex]\alpha = \frac{1 - 0.95}{2} = 0.025[/tex]
Now, we have to find z in the Ztable as such z has a pvalue of [tex]1 - \alpha[/tex].
That is z with a pvalue of [tex]1 - 0.025 = 0.975[/tex], so Z = 1.96.
Now, find the margin of error M as such
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.
Population standard deviation of $3,000.
This means that [tex]\sigma = 3000[/tex]
How large a sample should be taken if the desired margin of error is $500?
A sample of n is needed.
n is found when M = 500. So
[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]
[tex]500 = 1.96\frac{3000}{\sqrt{n}}[/tex]
[tex]500\sqrt{n} = 1.96*3000[/tex]
Dividing both sides by 500
[tex]\sqrt{n} = 1.96*6[/tex]
[tex](\sqrt{n})^2 = (1.96*6)^2[/tex]
[tex]n = 138.3[/tex]
Rounding up:
A sample of 139 should be taken.
Mrs. Yamaguchi's class weighed the potatoes that they grew in their garden and recorded the data in a
table. Determine how many dots are above each data value in a line plot of this data.
Weights of Potatoes (in pounds)
5
8
8
2
5
1
1
3
2
2
4
1
3
1
8
4
2
1
3
3
2
4
8
The value will have
1
dots above it.
1
dots above it.
The value will have
The value will have
3
dots above it.
The value will have
2
dots above it.
Answer:
The value
1
8
will have
1
dots above it.
The value
1
4
will have
2
dots above it.
The value
3
8
will have
3
dots above it.
The value
1
2
will have
5
dots above it.
The value
5
8
will have
2
dots above it.
The value
3
4
will have
3
dots above it.
Step-by-step explanation:
I took the test
Solve for x and y simultaneously in
Answer:
forgot to add a pic
Step-by-step explanation:
Write an inequality for the sentence below and then solve and check it. The sum of w and nine is less than 18
Answer:
w < 9
Step-by-step explanation:
w + 9 < 18
To solve this inequality, we MUST get the w by itself
Subtraction Property of Equality w + 9 - 9 < 18 - 9
Answer w < 9
quiz consists of 20 multiple choice questions, each with five possible answers, only one of which is correct. If a student guesses on each question, what is the mean and standard deviation of the number of correct answers?
mean: 4; standard deviation: 1.78885438
mean: 10; standard deviation: 1.78885438
mean: 4; standard deviation: 2
mean: 10; standard deviation: 3.16227766
Answer:
I think mean 10; 3.16
Step-by-step explanation:
4) What is the total cost (tax and price) on a purchase of $108.50 if the sales tax is 8%?
D) $195.30
A) $86.50
B) $8.68
C) $117.18
Answer in the attachment :)
I think it's c hope it's right
Please help.. I really don't understand this
Answer:
The answer is 62 degrees
Step-by-step explanation:
I was kind of anticipating this question, given the others you posted. :) It builds on what you learned in the last 2.
Two angles that form a straight line = 180 degrees.
So x + 149 = 180, x = 31.
Now look at the horizontal line that is parallel on top. The corresponding angle for x is the upper left angle.
And the prior example also said that vertical angles/opposite angles are equal. So x = y, so y = 31 also.
The question is what is x + y
31 + 31 = 62
please let me know if you have questions about this.
if you actually know the answer please give me an explanation of the answer so i know you're not just answering for points.
Answer:
i think it's A but I'm not to sure
Step-by-step explanation:
don't count my word for it just here with a geuss
Find the missing length as shown in the picture
The triangles are similar
I need an explanation
Answer:
15
Step-by-step explanation:
ΔRST ≈ ΔRDE
[tex]\frac{RS}{RT} =\frac{RD}{RE} \\\\\frac{35}{56} =\frac{x}{24} \\\\56x=840\\x=15[/tex]
RD = 15
