PLEASE QUICK I GIVE BRAINLIEST
How many elementary students are in this random sample? Use a numerical value as your answer.
Answer:
30 elementary students
Step-by-step explanation:
There are 13 households with 1 child
There are 11 households with 2 children
There are 4 households with 3 children
There is 1 household with 4 children
There are 0 households with 5 children
There is 1 household with 6 children
There are 0 households with 7 children
Therefore, there's a total of 13+11+4+1+0+1+0=30 elementary students
If the amount of time to prepare and deliver a pizza from MOD PIZZA is normally distributed with a mean of 20 minutes and standard deviation of 5 minutes.
Determine the percent of pizzas that were prepared and delivered:
(a) Between 20 and 25 minutes (b) In less than 18 minutes
( c ) If MOD PIZZA advertises that the Pizza is free if it takes more than 30 minutes to deliver, what percent of the pizza will be free?
I need to answer a,b and c - it is not mutiple choice. I also need to show all relevant steps and plus I really want to understand how to do this! I am completely stuck on this one and its due tonight. Please help!! :) Ill give badges, brainliest, thanks, all of that for whoever can help me!
Using the normal distribution, we have that:
a) 34.13% of pizzas were prepared and delivered between 20 and 25 minutes.
b) 34.46% of pizzas were prepared and delivered in less than 18 minutes.
c) 2.28% of the pizza will be free.
Normal Probability DistributionThe z-score of a measure X of a normally distributed variable with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex] is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score measures how many standard deviations the measure is above or below the mean. Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.The mean and the standard deviation are given, respectively, by:
[tex]\mu = 20, \sigma = 5[/tex]
For item a, the probability is the p-value of Z when X = 25 subtracted by the p-value of Z when X = 20, hence:
X = 25:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{25 - 20}{5}[/tex]
Z = 1
Z = 1 has a p-value of 0.8413.
X = 20:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{20 - 20}{5}[/tex]
Z = 0
Z = 0 has a p-value of 0.5.
0.8413 - 0.5 = 0.3413.
Hence 34.13% of pizzas were prepared and delivered between 20 and 25 minutes.
For item b, the probability is the p-value of Z when X = 18, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{18 - 20}{5}[/tex]
Z = -0.4
Z = -0.4 has a p-value of 0.3446.
34.46% of pizzas were prepared and delivered in less than 18 minutes.
For item c, the proportion is one subtracted by the p-value of Z when X = 30, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{30 - 20}{5}[/tex]
Z = 2
Z = 2 has a p-value of 0.9772.
1 - 0.9772 = 0.0228, hence 2.28% of the pizza will be free.
More can be learned about the normal distribution at https://brainly.com/question/28135235
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Rewrite the equation below so that it does not have fractions. 4/9x-2=5/6
Answer:
0.44x-2=0.83
Step-by-step explanation:
What is the measure angle of 3
PLEASE HELP WORTH 10 points
Answer:
Step-by-step explanation:
the third angle = 90 -61 = 29
hope that helps
Emily buys a pack of 12 bottles of water
Pls help me ASAP pls
Answer:
[tex]y = \sqrt[5]{50} [/tex]
Step-by-step explanation:
[tex]25 + 25 = {y}^{5} [/tex]
[tex] {y}^{5} = 25 + 25[/tex]
[tex] {y}^{5} = 50[/tex]
Take the 5th root of both sides of the equation to eliminate the exponent on the left side.
[tex]y = \sqrt[5]{50} [/tex]
Hope it is helpful.....what's the common factor of 3 8 2 and 5
Answer:
1
Step-by-step explanation:
What is the perimeter of the shape below
Answer:
Show the shape.
Step-by-step explanation:
Answer:
You didn't attach any work.
What is the supplement of 12
Need help with this question. I know a is yes, b and c I don’t know, and c is yes.
Answer:isk
Step-by-step explanation:
neddddd helpp plzzz really asap
Answer:
2(x+3)hope it helps.
stay safe healthy and happy.Answer:
2*x3
Step-by-step explanation:
* mean's tims
There are 24 events at an indoor track and field meet. The ratio of track events to field events is 7:5. How many of the events are track event
April has 5 milligrams of zinc and 0.25 milligrams of copper.
How much more zinc does she have than copper?
Answer:
It's 4.75
Step-by-step explanation:
If you subtract 5-.25=? The answer would be 4.75. Hope this helps.
List 3 values that would make this inequality true. 10≥2n
10
0
5
8
6
7
2
Answer:
0, 2, 5
Step-by-step explanation:
10 ≥ 2n
Divide both sides by 2
5 ≥ n
Flip
n ≤ 5
Values less than or equal to 5
0, 2, 5
A flowerpot has a circular base with a diameter of 27 centimeters. Find the circumference of the base of the flowerpot. Round to the nearest tenth.
How would you go about solving this?
The circumference of the base of the flowerpot is 84.8cm
What is circumference of a circle?Circumference of a circle can be described as the length or distance of a circle.
The formular that can be used to calculate the circumference of a circle is
= 2πr
Radius= diameter/2
= 27/2
= 13.5
The circumference can be calculated as follows
= 2πr
= 2 × 3.142 × 13.5
= 84.83
≅ 84.8 (to the nearest tenth)
Hence the circumference of the base of the flower pot is 84.8 cm
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Bernard earns a 37% commission
for all the sales he makes in a month.
Last month his total sales were
$12,500.00. How much was his
commission last month?
A. $125.00
B. $1250.00
C. $375.00
D. $3750.00
HELP ME !! AND EXPLAIN HOW YOU GOT IT.
PLEASE ANSWER !! ILL GIVE BRAINLIEST !!
50 POINTS !!
FAKE ANSWERS WILL GET REPORTED .
Answer:
<1= 62
•it is 62 because it is an alternate interior angle which is congruent
<2= 83
• when you add the given angles 62 and 35 you get 97 and a triangle is 180 so you subtract 97 from 180
<3=35
• it is 35 because it is an alternate interior angle which is congruent
Step-by-step explanation:
62+35= 97
180-97= 83
Can anyone help please? Just a quick answer or explain it.
Answer:
B
Step-by-step explanation:
mrk brainliest plz
Sally has 2 pets in her house. The weight of her dog is 50 pounds and the weight of her cat is 12 pounds. By how much is the weight of the dog more than the weight of the cat?
A. 38 lb.
B. 30 lb.
C. 28 lb.
D. 20 lb.
Answer:
the answer is A. 38lb.
i hope this helps :)
Step-by-step explanation:
???????????????????????
I WILL GIVE Brainiest IF YOUR RIGHT
Answer:
answer: 60
Hope that helps!
Answer:
G. 60 m²
Step-by-step explanation:
The lawn is in the shape of a trapezium.
The area of a trapezium can be found using the equation 0.5*h*(a+b), where h is the height and a and b are the top and bottom of the shape.
Area = 0.5*h*(a+b)
= 0.5*4*(12+18)
= 60 m²
Events A and B are mutually exclusive. Events B and C are non-mutually exclusive. Which Venn diagram could represent this description? Circles A, B, and C overlap. Circles A and B overlap. Circle C is to the side. Circles A, B, and C are shown. They do not overlap. Circles A and C overlap, and circles C and B overlap.
Answer:
correct its d
Step-by-step explanation:
What is the area of square B?
Answer:
30
Step-by-step explanation:
B is not a square, it’s a rectangle. It has a area of 5x6=30 cm^2
The perimeter of the traingle below is 8x-6
For a new neighbor, 1 acre of land will be split into 5 lots.How many acres of land will be in each lot.
Can someone help me? It would mean the world if u helped me have a nice day! <3
500 ml water 4 times a day = 500x4= 2000 ml water per day
there are 7 days in a week so,
2000 x 7 = 14000 ml
1000mililitre = 1 litre
14000ml = 14 L per week
The Jones brother, Carl, Cameron, and Carlos, are painters. Together they can paint a standard sized room in 2 hours. If Carl is alone on the job he can paint the room in 5 hours. If Cameron is alone he can paint the room in 6 hours.
Answer: Best anwser 5.5
Step-by-step explanation:
Select all that apply.
Select the real words which can be formed with pass.
passable
passage
passdom
passen
passing
passly
Answer:
passable
passage
passing
Answer:
passable, passage, passing
Step-by-step explanation:
passable is a word
passage is a word
passdom isn't a word
passen isn't a word
passing is a word
passly isn't a word
Four times a number, added to the sum of the number and five
Answer:
4X+(X+5)
Step-by-step explanation:
I got this correct on a test
Answer:
(4 x X) + X + 5
Step-by-step explanation:
Is your algebra expression.
Name a pair of adjacent supplementary angles.
Answer:
angle. LJK and angle. LJN