Somebody HURRY I NEED HELP
Answer:
1/5^3
Step-by-step explanation:
5 ^ -3 = 1 / 5^3 = 1 / 125
A large school district is considering implementing a program that, if successful, would improve the reading scores of its students by 10 points. The current reading scores for the district are normally distributed with a mean of 25 and a standard deviation of 8. The administrators decide to test the new program in one school of 200 students. What is the standard deviation of the comparison distribution
Answer:
The standard deviation of the comparison distribution is 0.5657.
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].
In this question:
Standard deviation of the population is 8, sample of 200. So
[tex]s = \frac{8}{\sqrt{200}} = 0.5657[/tex]
The standard deviation of the comparison distribution is 0.5657.
A virus has infected 400 people in the town and is spreading to 2.5% more people each day.
Write an exponential function to model this situation, then find the number of people that will be
infected in 10 days.
Answer:
3725 infected people in 10 days
Step-by-step explanation:
that is the answer
5th grade math. correct answer will be marked brainliest.
Answer:
10/40
28/40
Step-by-step explanation:
The common denominator of 4 and 10 is 40.
Therefore, you should mutliply 1/4 with 10, which equals 10/40.
You should multiply 7/10 with 4/4, which equals 28/40.
Convert the following angle from degrees to radians. Express your answer in simplest
form.
90°
Answer:
The answer is just 90 degrees because i solved it
Step-by-step explanation:
hello! I am currently failing math class and if I don’t get it together I might have to repeat the grade! so I really need you help and if you have the answer let me know in the comments please !! <3 :)
question⬇️⬇️
Hannah ran 10 miles. how many feet is this ?
10 miles in feet is 52800ft.
1 mile in feet is 5280 and when multiplying by 10, you usually just add a zero at the end of the number which makes 5280 turn into 52800!
If this is incorrect please don't refrain to tell me and I'll correct my answer. Thank you.
james jogged around the track 0.68 hours at an average speed 28.9 miles per hour how far did he jog?
Answer:
Step-by-step explanation:
0.68hr(28.9mi/hr)=19.652mi
The net of a rectangular prism is shown below. What is the total surface area of the prism in square centimeters?
A. 208 cm2
B. 96 cm2
C. 160 cm2
D. 144 cm2
Answer:
B.96
Step-by-step explanation:
Abdul sells Health magazines and books.
The table shows prices for both.
Magazines
£7
Books
£12
h
Each week Abdul earns:
£150 basic pay
10% of the magazine price for each sold
15% of the book price for each sold
Last week Abdul sold 50 magazines and 21 books.
Work out the total amount Abdul earned last week.
Answer:
222.80
Step-by-step explanation:
My keyboard won't do pounds. I'll leave the units off and just use pure numbers.
Magazines
Number of magazines = 50
Commission = 10/100
Price of magazines = 7
Books
Number of books = 21
Cost per book = 12
Commission = 15/100
Solution
Income from magazines = 10/100 * 7 * 50 = 35
Income from books = 15/100 * 12 * 21 37.80
Basic Pay 150
Take home pay 222.80
What is the value of x in the figure below?
Answer:
x = 25°
Step-by-step explanation:
The sum of interior angles in a triangle is equal to 180°
The given triangle is a right triangle which means one of its angle has a measure of 90°
since thd other angle is given as 65 to calculate x we just add the given measures and subtract it from 180
90° + 65 + x = 180
155 + x = 180 subtract 155 from both sides
x = 25°
Find the AREA of the triangle below.
Answer:
212.5
Step-by-step explanation:
a=b*h/2
b=25
h=17
25*17 =425
425/2=212.5
a=212.5
Help for brainiest
please explain how you got it :D it would help so I can understand how to do the rest
Answer:
Option D
Step-by-step explanation:
Formula to use: V=[tex]\frac{1}{2}(b*a)*h\\[/tex]
b=base of triangle a=altitude of triangle h=height of prism
Doing [tex]\frac{1}{2}(b*a)[/tex] is essentially finding the area of the triangle and after multiplying by h will give you the volume of the triangular prism.
Solve: V = [tex]\frac{1}{2}(3*3)*7[/tex] or option D
Ps. Altitude is perpendicular or 90 degrees to the side I used for the base, so it wouldn't be option C.
Find the measure of the arc.
D
А
146°E
B
mĒDF = [?]°
Enter
Answer: 214
hope this helped.
The measure of the arc is 214 degrees
What is Circle?A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre.
The measure of the arc FE is 146 degrees.
Measure ED is 90 degrees.
To find the measure of the arc EDF we have to find the measure of DF.
146+90+x=360
236+x=360
Subtract 236 from both sides
x=360-236
x=124
Now let us find the arc measure EDF =Measure of ED + Measure of DF
=90+124
=214 degrees
Hence, the measure of the arc is 214 degrees
To learn more on Circles click:
https://brainly.com/question/11833983
#SPJ7
1/8+ c = 4/5
27/20 = c
Answer: the answer will be for c is 27 over 40
Step-by-step explanation:
A campground owner has 1300m of fencing. He wants to enclose a rectangular field bordering a river, with no fencing along the river. (See the sketch.) Let x represent the width of the field. (a) Write an expression for the length of the field as a function of x. (b) Find the area of the field (arealengthwidth) as a function of x. (c) Find the value of x leading to the maximum area. (d) Find the maximum area.
Answer:
(a). The length of the field is 1,300 - 2·x
(b) The area of the rectangular field is 1,300·x - 2·x²
(c) x leading to the maximum area is 325 meters
(d) The maximum area is 211,250 m²
Step-by-step explanation:
The given parameters are;
The length of fencing the compound owner has = 1,300 m
The shape of the field he wants to enclose = Rectangular field
The width of the field he wants to enclose = x
The fence on the side along the river = No fencing along the river
(a). Let 'l' represent the length of the field, we, have;
2·x + l = 1.300
∴ l = 1,300 - 2·x
The length of the field, l = 1,300 - 2·x
(b) The area of a rectangular field, A = Length of the field, l × Width of the field, w
Therefore;
The area of the rectangular field, A = x × (1,300 - 2·x) = 1,300·x - 2·x²
The area of the rectangular field = 1,300·x - 2·x²
(c) The coefficient of x² is negative, therefore, the graph of the area has a maximum point
The value of 'x' leading to maximum area is given by differentiating the function representing the area, equating the result to 0, and fining the value of 'x' as follows;
d(A)/dx = d(1,300·x - 2·x²)/dx = 1,300 - 4·x
d(A)/dx = 0 at the maximum point
∴ 1,300 - 4·x = 0
4·x = 1,300
x = 1,300/4 = 325
x leading to the maximum area = 325 meters
(d) The maximum area, [tex]A_{max}[/tex] is given by A = 1,300·x - 2·x², when x = 325
∴ [tex]A_{max}[/tex] = 1,300 m × 325 m - 2 × (325 m)² = 211,250 m²
The maximum area, [tex]A_{max}[/tex] = 211,250 m²
Can someone please help me with this
9514 1404 393
Answer:
360°
Step-by-step explanation:
The sum of exterior angles of any convex polygon is 360°.
__
You can see this if you draw each external angle, then reduce the side lengths of the polygon to zero. You will see that the angles add up to one full turn, or 360°.
Alex has 30,000 in his savings account that earns 10%
annually.
How much interest will he earn in one year?
Answer:
i dont know im so sorry
Step-by-step explanation:
i hope u find ur answer
50 POINTS FOR THIS IF ANYONE CAN GIVE ME A DECENT ANSWER AND BRAINIEST ANSWER
help me sketch the graph of x/4 + y/-3 = 1?
give me a reason why you put a mark there on graph thanks.
PLEASE
Go from 1x down 3 and right 4
Then draw a line connecting it
What is the difference in the number of mongolians living in urban and rural areas
Difference means subtraction; in other words, the difference between data is calculated by subtracting the smaller value from the larger value.
The difference between the population living in the urban and the rural area of Mongolia are: 1195830
To continue, I will make the following observations dataset for Mongolians.
[tex]Population = 3.225\ million[/tex]
[tex]Rural = 31.46\%[/tex]
[tex]Urban = 68.54\%[/tex]
The difference (d) in the percentages is:
[tex]d = Urban - Rural[/tex]
[tex]d = 68.54\% - 31.46\%[/tex]
[tex]d = 37.08\%[/tex]
So, the actual difference (in numbers) is the product of the percentage difference by the population of Mongolia
i.e.
[tex]D = d * Population[/tex]
[tex]D = 37.08\% * 3.225\ m[/tex]
[tex]D = 1195830[/tex]
Hence, the difference between the population living in the urban and the rural area of Mongolia are: 1195830
Read more about differences (subtraction) at:
https://brainly.com/question/213283
Terry’s garden is in the shape of a quarter-circle with radius 24 meters. What is the area of her garden?
Answer: 1809.56 let me know if it is right?
Step-by-step explanation:
Looking for help with some geometry questions today!
Please only answer if you know the answer and can support it by showing you work. If you have a comment or do not know the answer, tell me that in the comment section, do not answer the question. Don't take my points and I want take yours!
Anyways, please show all of you work and explain your thinking! Answer all 5 parts of this question! Good luck!
Answer:
A) Central angle has same value as intercepted arc
GD is the diameter ⇒ mGFED = 180°mDE + mGF = 180° - 90°mDE = 90° - mGF = 90° - 46° = 44°B) Inscribed angle is half of the intercepted arc:
∠WTV = 1/2(90°) = 45°C) Sum of angles of triangle is 180° and inscribed angle is half of the intercepted arc:
m∠RST = (180° - 67° - 102°/2) = 62°D) Inscribed angle is half of the intercepted arc:
m∠HJK = 1/2(80° + 84°) = 62°mHJ = 2*81° - 84° = 98°E) Tangent chord angle is half of the intercepted arc:
m∠XYZ = 1/2(188°) = 94°Hi i need help. I will give brainliest
I need help with #18
Answer:
1. a
2.60
3.g
Step-by-step explanation:
you buy a watch that cost 45.50. The tax rate is 9.5%. What is the final cost?
Answer:
$49.8225
Step-by-step explanation:
9.5%=0.095
45.50*0.095=4.3225
45.50+4.3225=49.8225
Which is the approximate solution to the system y= 0.5x + 3.5 and y= -2/3x + 1/3 shown on the graph?
Answer: 1. 4, 2. 1x.
Step-by-step explanation:
ramu and ravi borrowed rs 8000
Answer: Rs. 11,520
Step-by-step explanation:
As the method of compounding is not stated, the default of simple interest will be used.
Simple interest is a fixed amount that is paid over the course of the loan and is based on the original amount borrowed.
Formula is:
Amount owed = Amount borrowed * ( 1 + rate * time)
= 8,000 * ( 1 + 8% * 5.5 years)
= 8,000 * 1.44
= rs 11,520
find the surface area of a cylinder with the height of 10 inches and a base diameter of 6 in
Answer:
339.24
Step-by-step explanation:
To find the surface area, you will need to the the area of the base of the cylinder. To do that, use the formula A=pi (r)^2
The radius is half the diameter do r=3
3.14(3)^2 should give you about 28.27.
This is the area of the top and bottom of the cylinder.
Now, do 28.27x10=282.7 to find the height surface area.
282.7+28.27+28.27=Surface area.
SA= about 339.24
Davidson purchases a set of pens priced at $14.72. If they were originally priced
at $18.44, what is the percent off?
Answer:
25% off
Step-by-step explanation:
Just divide 18.44 and 14.72 take off the one and KABOOM answer it's right, trust me.
Someone please help me find the area I’ll give brainliest
Answer:
The area of the rectangle? If so it's 240.
Given leg a=7 and hypotenuse c= 15, what is the length of leg B ?
SOMEONE, PLEASE SEND HELP
A bag has 8 green, 2 yellow, 6 blue, and 4 red marbles. What is the probability of selecting a green marble, keeping it, and then selecting another green marble?
4/25
1/400
1/380
14/95
Answer:1/400
Step-by-step explanation:
because you have to add