Considering the given discrete distribution, it is found that the probability that a randomly selected student earned a C or better is of 0.91.
What does the discrete probability distribution gives?It gives the probability of each grade, as follows:
P(X = A) = 0.43.P(X = B) = 0.31.P(X = C) = 0.17.P(X = D) = 0.05.P(X = E) = 0.04.Hence, the probability of a grade of C or better is given by:
[tex]P(X \geq C) = P(X = A) + P(X = B) + P(X = C) = 0.43 + 0.31 + 0.17 = 0.91[/tex]
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Answer:
16. Angle 2 is 30° and angles 1 & 3 are 150°
17. Equilateral (all sides are equal)
18. A, B, D
19. A, B. (8 angles and all sides are congruent)
20. False.
Step-by-step explanation:
angle 2 is a corresponding (ish) angle to the one marked 30°, so they are the same. and then the other angle is supplementary to the 30° one, therefore they must add up to 180 degrees. 180-30= 150 so that is angle 1 and 3.
Answer:
question 1 - angle 1 and 2 the answer is 150 and angle 3 is 30
question 2 - the triangle is an equilateral
Question 3 - A,B,D
question 4 - A,B
Step-by-step explanation:
Two rectangles have the same area of 70m2. It is given that the length of the first rectangle is 4m longer and the width is 2m shorter than the dimensions of the second rectangle. Find the lengths of the sides of these rectangles.
Answer:
second rectangle
longer = 10
width = 7
first rectangle
longer = 14
width= 5
Step-by-step explanation:
A sculpture is made of solid nickel in the shape of a cone. The sculpture is 84 inches tall, and its base has a radius of 8 inches. If nickel costs $2.25 per cubic inch, how much did the nickel for the sculpture cost?
Use 3.14 for π, and do not round your answer.
Answer:
Cost = $12660.48
Step-by-step explanation:
Given that,
The height of the cone shape, h = 84 inches
The radius of base, b = 8 inches
The cost per cubic inch is $2.25.
The cost of nickel for the sculpture is given by :
[tex]C = 2.25\times \dfrac{1}{3}\pi r^2 h\\\\=0.75\times 3.14\times 8^2\times 84\\\\C=\$12660.48[/tex]
So, the required cost is equal to $12660.48.
The January record high temperature in Austin, Texas is 92 degrees. The January record low temperature is -1 degree. What is the difference between the record high and low temperatures?
Answer:
93
Step-by-step explanation:
The forecast high is the highest temperature expected to occur that day, which in most cases is in the afternoon. When referring to the recorded high/low from a previous day, the high and low-temperature values are the actual temperature extremes that were recorded during that 24-hour calendar day.
Given: Texas is 92 degrees. January's record low temperature is -1 degrees.
To find: What is the difference between the record high and low-temperatures?
Solution: Subtract -1 from 92, 92 - (-1) = 93
Please help me :))))((
Answer:
b
Step-by-step explanation:
What is the surface area of the composite figure? Round to the nearest tenth.
Answer:
2855.0
Step-by-step explanation:
there are several surface areas.
1. outside surface of the cylinder = circle circumference times height = 2*pi*r*height = 2*pi*14*14 = 1231.5
2. top and bottom of the cylinder = circle area times 2 = pi*r^2 * 2 = pi*14^2 *2 = also 1231.5
3. subtract the 2 cut out rectangles on the top and the bottom = 2* 6*14 = 168
4. add the areas of the inside walls of the cut out block.
there are 2 narrow rectangles = 2* 6*14 = 168
there are 2 squares = 2* 14*14 = 392
so, 1.+2.-3.+4. = 2855.0 (2855.00864...)
sharice is putting jars of jam into boxes. she puts 8 jars into each box, and she has a total of 144 jars. sharice wants to know how many boxes she needs. but someone ask that question already but I can not see what they wrote it is blanked out.
18 boxes.
144 divided by 8 is 18.
Answer:
18 boxes
Step-by-step explanation:
She has 144 jars and she puts 8 into every box so, 144/8=18 boxes. Hope this helps!
Pls help and show how do show it on paper
Answer:
there is really no way to show but all you have to do is look at the angle across from angle 1 which is angle 4 because it is vertical to angle 1. hope that helps
Wilson cut open a packing box that was shaped like a
rectangular prism to see the net. What shapes did Wilson
see?
Answer:
a square and a rectangle
Step-by-step explanation:
In Oo, mCA= 100 and ABCD.
What is mBD?
mBD
Answer:
arc BD = 100
Step-by-step explanation:
arc BD = arc CA because ∠AOC = ∠BOD (vertical angles)
arc BD = 100
Find the volume of a right circular cone that has a height of 19.1 cm and a base with a radius of 13.6 cm. Round your answer to the nearest tenth of a cubic centimeter.
Answer: 3699.5 cm3
Step-by-step explanation:
Tanya used 3/4 cup of flour to make 1/2 batch of muffins ?
Answer:
whats the full question?
Step-by-step explanation:
The answer is C.
PLEASE HELPP!!! I don’t know how to do this
Answer:
773.8 inch²
Step-by-step explanation:
Find the surface area at first
the top and bottom = 6²π = 36π
around is circumference x by height = 12π x 15 = 180 π
multiply these by 3/4
top = 27π
bottom = 27π
around = 135π
add the two rectangles = 180 inch²
Total = 773.8
Kaylie is making miniature stairs for her model of an office building. How much plaster does she need?
What’s the value of x?
answer
5
2x =10
÷2. ÷2
× = 5
4 cousins share 3 pies
Answer:
1.33
Step-by-step explanation:
Answer:
cut each pie into quaters and then give each cousin three pieces.
4/3.
Step-by-step explanation:
Evaluate the equation: e - 3.1 = 5
A. e = 1.9
B. e = 2.1
C. e = 8.1
D. e = 8.5
Answer:
C. e = 8.1
Step-by-step explanation:
e-3.1= 5
e = 5+3.1
e = 8.1
Help me please and thank you
Answer:
is B
Step-by-step explanation:
1.A catheter at an angle of 30 ° is equal to half of the hypotenuse.
Need help will give thanks and brainlest or which answer A B C or D
Answer:
B
Step-by-step explanation:
The theory formula is A^2 + B^2 = C^2
C^2 is the longest side in this case
Find the missing length to the nearest tenth using the Pythagorean Theorem.
a = ?, b = 10, c = 12
Is -2 rational or irrational?
Answer:
Rational
Step-by-step explanation:
Rational. It can be expressed as a fraction, which is the definition of a rational number.
Hope this Helps!
-2 is rational
This is because every negative integer is a negative rational number.
We know that -1 = -1/1, -2 = -2/1, -3 = -3/1, -4 = -4/1 and so on …….
In other words, any negative integer n can be written as n = n/1, here n is negative and 1 is positive.
So, negative 2 is rational.
Please someone help me!!!
It’s solving for x
(Due at 3:00 pm)
1. Annette scored 85. 73. and 94 on her first three quizzes. How high does she need to
score on her fourth quiz to keep her quiz average at at least a B (8046) ?
Answer:
at least a score of 68
Step-by-step explanation:
(85+73+94+q)/4 ≥ 80
(252 + q)/4 ≥ 80
multiply each side by 4 to get:
252 + q ≥ 320
q ≥ 68
3 security guards below whistle at interval of 50 minutes, 60 minutes and 100 minutes if they blow together at 1:00am,at what time will they blow together again
Answer:
They will blow together again at 6:00 am
Step-by-step explanation:
Guard 1 whistles every 50 minutes.
Guard 2 whistles every 60 minutes.
Guard 1 whistles every 100 minutes.
Assuming that at the beginning they whistle together, the next time that they will whistle together is after the smallest common multiple of 50, 60, and 100.
Because one of the numbers is 100, it only has multiples like:
100*2 = 200
100*3 = 300
100*4 = 400
etc...
So we need to find a common multiple of 50 and 60 that is also a multiple of 100.
For example, the multiples of 50 that are also multiples of 100 are:
50*2 = 100
50*4 = 200
50*6 = 300
And the multiples of 60 that are also multiples of 100 are:
60*5 = 300
(this is the only one)
Then we can see that a common multiple of 50, 60 and 100 is 300.
Then they will whistle together 300 minutes after the first common whistle.
We know that they blow together at 1:00 am
300 minutes after it is:
First, we need to write 300 minutes in hours.
We know that one hour has 60 minutes.
then 300 minutes = (300 minutes/60 minutes) hours = 5 hours.
300 minutes after 1:00 am is the same as 5 hours after 1:00 am
And 5 hours after 1:00 am is 6:00 am
They will blow together again at 6:00 am
Help meeeee!!!!!!! I’ll give you a cookie.
Answer:
(-5,24)
Step-by-step explanation:
2f+3g-h
first we substitute in the numbers
2(-3)+3(1)-2
-6+3-2
-3-2
-5
Then again
2(5)+3(4)-(-2)
10+12+2
22+2
24
hope this helps!:)
estamate the value of y when x = 2.5
Answer:
There should be a rule
Step-by-step explanation:
Replace the x values from the question with the rule given and you will get your answer
Please answer this for me correctly. There are two questions. THANK YOU!!
Answer:
the second one is 57
the 1st is JIL
Thanks For Brainlist
find the solution of given expression
[tex] \sqrt{9 {}^{0} } [/tex]
Answer:
[tex] \sqrt{9 {}^{0} } [/tex]=[tex] \sqrt{1} [/tex]=±1 is your answer
Answer:
± 1
Step-by-step explanation:
Using the rule of exponents
[tex]a^{0}[/tex] = 1 , then
[tex]\sqrt{9^{0} }[/tex]
= [tex]\sqrt{1}[/tex]
= ± 1
hello please help i’ll give brainliest
Answer: The answer is D
Step-by-step explanation: It is the only option that makes sense to me.
Answer:
i need points
Step-by-step explanation:
¿A qué aumento único equivalen tres aumentos sucesivos del 5%, 10% y 20%? SoLución por favor
Respuesta:98%
Explicación pasto a paso: Sumaremos la cantidad indicada con el 100%. Por ejemplo: 10%+100%= 110%
Entonces:
110/100 × 120/100 × 150%= 198%
Luego restamos: 198% - 100%= 98% Respuesta: Aumento único= 98%