Answer:
Hello, Here is your answer.
Finding the areas of each of the rectangles and squares of the net of a rectangular prism and adding up those areas gives the surface area or total surface area of the prism. For example, if the length of one side of the cube 4 units then the area of one its face is 4 × 4 = 16 square units.
Answer:
Step-by-step explanation:
By drawing a net, you can see each face of the prism. You can find the areas of each face and then add them together to find the total surface area.
help!!
using quadratic formula
round to the nearest hundred
Answer:
x=-7±√97/4
Step-by-step explanation:
-7±√97
______
4
Two angles of a quadrilateral measure 305° and 30°. The other two angles are in a ratio of
2:3. What are the measures of those two angles?
Answer:
10 and 15
Step-by-step explanation:
A quadrilateral will measure a total of 360 degrees. We already know that the measurements of other angles were 305 and 30. That's a total of 335 degrees. Subtract that from 360 to find out how many are left in the shape.
360 - 335 = 25. The other two angles are in a ratio 2:3. So you need to find numbers that add up to 25 in a ratio of 2:3
If you multiply that ratio by 5, you get 10:15. 10 and 15 add up to 25, so those are your other angles.
PLEASE HELP MEEEEEEEEE
Answer:
Step-by-step explanation:
Emergency rooms have reason to suspect that visits increase on the weekends. A recent report indicates that Monday through Thursday represent 10% per day of the weekly total visits while Friday accounts for 15%, Saturday 25% and Sunday 20%. If your ER has the following pattern, Monday, 120, Tuesday, 130, Wednesday 110, Thursday 95, Friday 160, Saturday 280 and Sunday 105. Does your facility have the same pattern as the recent report at the 10% level
Answer:
No the facility dose not have the same pattern as the recent report at the 10% level
Step-by-step explanation:
To determine if the Facility have the same pattern ; Perform Chi squared test for Goodness of fit
state the hypothesis
H0 : μ = same pattern
Ha : μ ≠ same pattern
expected frequency ( E ) = proportion * summation of frequency
summation of frequency = 1000
degree of freedom = 7 - 1 = 6
Next : Calculate the expected frequency (E) , (O-E)²/E. given that the observed frequency and expected proportion is given
For Monday
expected frequency = proportion * frequency = 0.1 * 1000 = 100
(O-E)²/E. = ( 120 - 100 )^2 / 100 = 4.0.
observed frequency ( O ) , expected frequency ( E )
For Tuesday
E = 0.1 * 1000 = 100
(O-E)²/E = ( 130 - 100 )^2 / 100 = 9.0
Repeat same calculations for Wednesday through Sunday
Then perform Chi-squared test
X² = Σ(O-E)²/E = 63.642
∝ = 0.1
df = 6
hence P-value = 0.000 ( =chisq.dist.rt(test-stat,df)
since P-value < ∝ ; we will fail to reject Ha hence we reject H0
a tom tom hoop drum is made up of streched membranes, called heads, which are held tightly across a tubular shell. the drum has diameter 30 cm and height 30 cm. the shell of the drum is made of 5 layers of birch sheathing.a) how much sheating is needed to make the shell?
i d k
Step-by-step explanation:
Which of the following represents the ratio of the corresponding sides of ABC to DEF?
PLEASE HELP ME ASP !! ..
Answer:
Your answer is correct; 2:1
Step-by-step explanation:
Write the percentage shown in the model
Find the expected value of the winnings
from a game that has the following
payout probability distribution:
Payout ($) 2
4
6
8
10
Probability 0.45 0.3 0.1 0.1 0.05
Expected Value = [?]
Round to the nearest hundredth.
PLEASE HELP !!!
============================================================
Explanation:
Refer to the table below (attached image). I've copied your table and added a third row at the bottom. This new row is the result of multiplying each payout value with the corresponding probability.
Example: for the first entry of this row, have 2*0.45 = 0.9
Once that third row is filled out, you add up everything in that row. That will lead to the expected value.
The expected value is: 0.9+1.2+0.6+0.8+0.5 = 4
Interpretation: You expect, on average, to win $4 each time you play the game. This assumes that the cost to play the game is 0 dollars. If the cost is something else, then it will affect the expected value.
Because the expected value is not 0, this game is not mathematically fair (the bias is leaning in favor of the player).
Which statement is true?
Group of answer choices
An equilateral triangle is never an acute triangle.
An isosceles triangle is sometimes a scalene triangle.
An acute triangle is always an equilateral triangle.
A equilateral triangle is always an isosceles triangle.
Answer:
An equilateral is always an isosceles triangle.
Step-by-step explanation:
Which of the following is not equivalent to the following expression 3)____ 2x2- 16
a. 2x2 + 4x – 4x - 16
b. 2(x2 – 8)
c. 2(x + 8)
d. 4x2 - 32
2
An article presents a study of the failure pressures of roof panels. A sample of 15 panels constructed with 8-inch nail spacing on the intermediate framing members had a mean failure pressure of 8.48 kPa with a standard deviation of 0.96 kPa. A sample of 15 panels constructed with 6-inch nail spacing on the intermediate framing members had a mean failure pressure of 9.93 kPa with a standard deviation of 1.02 kPa. Can you conclude that 6-inch spacing provides a higher mean failure pressure
Answer:
There is sufficient evidence to conclude that six inches spacing has a higher mean failure pressure than 8 inches
Reject [tex]H_0\ at\ 5%[/tex] level of significance
Step-by-step explanation:
From the question we are told that:
Sample size 1 [tex]n_1=15[/tex]
Spacing 1 [tex]s_1=8[/tex]
Mean 1 [tex]\=x_1=8.48[/tex]
Standard deviation 1 [tex]\sigma_1=0.96 kPa[/tex]
Sample size 2 [tex]n_2=16[/tex]
Spacing 2 [tex]s_2=6[/tex]
Mean 1 [tex]\=x_1=9.93[/tex]
Standard deviation 1[tex]\sigma_1=1.02 kPa[/tex]
Generally the hypothesis is mathematically given as
Null [tex]H_0:\mu_1-\mu_2[/tex]
Alternative [tex]H_a:\mu_1\mu_2[/tex]
Generally the equation for pooled estimate is mathematically given by
[tex]S=\sqrt{\frac{(n_1-1)\sigma_1^2+(n_2-1)\sigma_2^2}{n_1+n_2-2} }[/tex]
Therefore
[tex]S=\sqrt{\frac{(15-1)0.96^2+(16-1)1.02^2}{15+15-2} }[/tex]
[tex]S=0.9905[/tex]
Generally the equation for test statistics is mathematically given by
[tex]t=\frac{\=x_1+\=x_2}{S\sqrt{\frac{1}{n _1}+\frac{1}{n_2}}}[/tex]
[tex]t=\frac{\=8.48-9.93}{0.9905\sqrt{\frac{1}{15}+\frac{1}{15}}}[/tex]
[tex]t=-4.00091[/tex]
Therefore From table
[tex]P value=P(t_{15+15-2}=4.00091)[/tex]
[tex]P value=0.00041918[/tex]
[tex]P<0.0005[/tex]
Therefore
There is sufficient evidence to conclude that six inches spacing has a higher mean failure pressure than 8 inches
Reject [tex]H_0\ at\ 5%[/tex] level of significance
The data set below shows the number of siblings of several students.
{2, 1, 0,5, 1,4,3}
Median =
Quartile 1 =
Quartile 3 =
The time married men with children spend on child care averages 6.4 hours per week (Time, March 12, 2012). You belong to a professional group on family practices that would like to do its own study to determine if the time married men in your area spend on child care per week differs from the reported mean of 6.4 hours per week. A sample of 50 married couples will be used with the data collected showing the hours per week the husband spends on child care. The sample data is below.
Hours Spent in Child Care
7.3
6.5
7.7
5.8
3.6
9.7
6.2
8.7
11.4
0.6
8.2
7.2
9.4
7.5
5.4
8
9.4
4.5
7.5
7.9
5.8
7.6
8.3
9.8
9
6.2
4.7
0.6
11.2
8.3
9
7.9
7
6.3
3.8
8.1
7
7.6
2.3
7
8
7.5
9
8.2
7.9
9
8
10
6
8.2
a. Formulate the hypotheses that can be used to determine whether the population mean -number of hours married mean are spending in child care differs from the mean reported by Time in your area.
b. What is the sample mean and the p-value?
c. At each significant level of 90%, 95% or 99%, what is your conclusion?
Answer:
H0 : μ = 6.4
H0 : μ > 6.4
Sample mean = 7.24
Pvalue = 0.120
At each α - level ; 0.1, 0.05, 0.01 ; We fail to reject the null
Step-by-step explanation:
From the sample data :
Mean, xbar, = The test statistic :
ΣX / n = 361.8 / 50 = 7.24
Standard deviation, s = √Σ(x - xbar)²/ n-1 = 2.263
The hypothesis :
H0 : μ = 6.4
H0 : μ > 6.4
The test statistic, Z ;
(xbar - μ) / s/√n
(7.24 - 6.4) / s/√n
0.84 / 2.263/√10
Z = 0.84 / 0.7156234
Z = 1.174
Using the Pvalue from Zscore calculator to Obtain the Pvalue ;
Pvalue = 0.120
Decision region :
Reject H0 ; if Pvalue < α
At 90% ; α = 0.1
Pvalue > α ; We fail to reject the Null
At 95% ; α = 0.05
Pvalue > α ; We fail to reject the Null
At 99% ; α = 0.01
Pvalue > α ; We fail to reject the Null
10. Giselle invests $16,250 in an account that earns 4.25% interest, compounded continuously.
How long, rounded to the nearest year, will it take for Giselle's money to grow to $40,000?
Answer: 24 years
Step-by-step explanation:
% • total = Answer
4.25% • $40,000 = Answer
.0425 • $40,000 = Answer
Answer = $1,700 per year
40,000 ÷ 1,700 = 23.5
23.5 rounded to the nearest year is 24
Please answer
I will mark as the brainliest the one whose going to answer right
A. Right triangles.
B. Height of 16cm with bases 20cm
C. 320
D.?
Help and explain please.
Answer:
a2 + b2 = c24 + b2 = 49b = [tex] \sqrt{45} [/tex]What are the slope and the y intercept of the graph of the linear function shown on the grid?
Answer:
The slope is -0.5 or -1/2
The y intercept is -2
4x + 9 + = 24 matematicas
Answer:
3.75
Step-by-step explanation:
4x+9=24
4x=24-9
4x=15
x=15/4
x=3.75
Answer:
ESTA MAL ES 25
Step-by-step explanation:
How many different 2 digit PIN numbers codes are possible? *
Answer:
there are 10 numbers 1,2,3,4,5,6,7,8,9,0,
Step-by-step explanation:
10000
Answer:
90
Step-by-step explanation:
NEED HELP ASAP WILL GIVE BRAINLIEST REAL ANSWERS ONLY PLZ WILL REPORT FAKE ANSWERS
Answer:
The graph has a domain of {x|0 < x < infinite} and approaches 0 as x decreases
The graph has a domain of {y| -infinite < y < infinite} and decreases as x approaches 0.
Step-by-step explanation:
I was confused at first because I was like "There is 2 answers" and I reread the question again and found my mistake.
And sorry for the wait because "I am in class"
The quotient of two numbers is 4. their sum is 20. What are the two numbers?
9514 1404 393
Answer:
16 and 4
Step-by-step explanation:
If x is the smaller one, then the larger is 4x. Their sum is ...
x + 4x = 20
x = 20/5 = 4
The two numbers are 16 and 4.
Help please i need this done i will mark brainlest and it will help me out a lot please
no links or images please just words!!!
Answer:
Perimeter is (width×height) but in this case it would be base×width & height...
First find the with of the triangle,by measureing the points with the base.
Second to find the base simply look equilateral and the half circle. and see how the lines in between it and the triangle collide. and count the spaces to find the base.
Third measure the height with the best estimate.
And finally, multiply by (h×w) and divide by the base.
After following these steps the answer I have come to is: 45
Step-by-step explanation:
I'm sorry if this is wrong I tried my best ❤️Good luck! and have a great day or night!
Answer:
42,84
Step-by-step explanation:
Remark
Two of the sides are 12 inches. The third side is also 12 but it serves as a diameter of the semicircle.
The circumference of the semi circle is 2*pi*r /2 = pi * r
The total perimeter is pi * r + 2*12
r = d/2
r = 12/2
r = 6
Perimeter = 6*pi + 24 might be you answer.
Perimeter = 42.84
I don't know which answer to use. It all depends how other questions have been answered. Sometimes you take the decimal answer and sometimes you take the answer in terms of pi. I think the latter is what I would try first.
What would be the simple interest on an amount of $4,000 at 4% interest?
$160
$150
$140
$130
Answer:
140
Step-by-step explanation:
The simple interest on an amount of $4,000 at 4% interest rate for one year is $160.
To calculate the simple interest,
Multiply the principal amount by the interest rate and the number of years.
In this case,
The principal amount is $4,000,
The interest rate is 4%,
And we don't know the number of years.
We can assume it's only one year,
So the calculation would be,
Simple Interest = Principal x Rate x Time
Simple Interest = $4,000 x 0.04 x 1
Simple Interest = $160
Therefore,
The simple interest on an amount of $4,000 at 4% interest for one year is $160.
Learn more about the multiplication visit:
https://brainly.com/question/10873737
#SPJ2
What is the least common
denominator of 9/15 and 2/3
Answer:5
Step-by-step explanation:
Express the null hypothesis and the alternative hypothesis in symbolic form. Use the correct symbol ( μ, rho, σ) for the indicated parameter. A psychologist claims that more than 5.8 percent of the population suffers from professional problems due to extreme shyness. Use p, the true percentage of the population that suffers from extreme shyness.
a) H0 : p = 5.8%
H1 : p < 5.8%
b) H0 : p = 5.8%
H1 : p ≥ 5.8%
c) H0 : p = 5.8%
H1 : p > 5.8%
d) H0 : p = 5.8%
H1 : p ≤ 5.8%
Answer:
c) H0 : p = 5.8%
H1 : p > 5.8%
Step-by-step explanation:
At the null hypothesis, we test that the percentage is equal to a certain value. At the alternate hypothesis, we have a test about this percentage, if it is more, less, or different from the tested value.
A psychologist claims that more than 5.8 percent of the population suffers from professional problems due to extreme shyness
At the null hypothesis, we test if the percentage is 5.8%
[tex]H_0: p = 5.8\%[/tex]
At the alternate hypothesis, we test if this percentage is more than 5.8%. So
[tex]H_a: p > 5.8\%[/tex]
This means that the correct answer is given by option c.
Answer:
c) H0 : p = 5.8%
H1 : p > 5.8%
Step-by-step explanation:
Hope this helps
HELPPPPPP?????????????????,,,,,,,????
Answer:
280 is the correct answer
Step-by-step explanation:
5 x 8 = 40
40 / 2 = 20
20 x 14 = 280
A bag contains 4 red balls and 6 green balls. You plan to select 3 balls at random. Determine the probability of selecting 3 green balls.
Determine the equation of this circle Assume the radius is a whole number (3,-2)
Answer:
1 1/2
Step-by-step explanation:
factor
1. 6a+ 48
2. 9a -81b
Answer:
1. 6(a+8)
2.9(a-9b)
Step-by-step explanation:
1. Factor 6a+48
6a+48
=6(a+8)
2. Factor 9a−81b
9a−81b
=9(a−9b)
Hope this helps :)
Find the area of the triangle
Answer:
About 292.72
Step-by-step explanation:
We can imagine a circle circumscribed around the triangle, then solve it as we normally do using the apothem. By dividing 360 by the number of sides (3) we know that the central angle constructed by the apothem and radiuses would be 120. Divided by 2 (because we are using a right triangle to solve it) is 60. Now with this you can either use trig ratios (sin, cos, or tan) or use special right triangles (30-60-90 or 45-45-90). I used special rights. With this I know my apothem is [tex]\frac{13\sqrt{3} }{3}[/tex]. Perimeter is 26 times 3 which is 78. The formula for area of regular polygons is 1/2(perimeter times apothem). When we plug our values in the answer is about 292.72. You are lucky that I just had my test on this, I hope it helps.
Here is my work since this is very visual for me:
