Tutors Answer Your Questions about Finance (FREE)
Question 1178700: Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p.
Of 82 adults selected randomly from one town, 66 have health insurance. Find a 90% confidence interval for the true proportion of all adults in the town who have health insurance.
Click here to see answer by robertb(5830)   |
Question 1178712: X 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12
P(X) 1/36 2/36 3/36 4/36 5/36 6/36 5/36 4/36 3/36 2/36 1/36
1.What value of x has the highest probability?
2.What is the range of x that has a probability above 4/36?
3.What is the sum of the probabilities from 2 to 12?
4.What is the shape of the graph of the distribution?
Click here to see answer by robertb(5830) |
Question 1183238: Hayden is playing with a toy airplane. The height of the airplane, in metres, is given by the relation
h = β5t^2+ 18t + 1, where t is the number of seconds since the plane was launched. At time t, the
horizontal distance travelled by the airplane is given by d = 4. 5t.
a) For how long will the airplane be in the air, rounded to the nearest tenth of a second? Β
b) How far will the airplane travel horizontally by the time it hits the ground, rounded to the
nearest tenth of a
metre? Β
c) At what time(s), rounded to the nearest tenth of a second, will the airplane reach a height of
12 m? Β
d) What is the maximum height or the plane?
Click here to see answer by ikleyn(52781)  |
Question 1183267: Hi can you please help me with this question. A golf ball is hit from the top of a tee. The quadratic equation y=-5x^2 + 20x + 0.05 describes its height,y, in metres as time,x, in seconds passes. Determine how long the ball is in the air. Thanks for the help
Click here to see answer by MathLover1(20849)  |
Question 1183267: Hi can you please help me with this question. A golf ball is hit from the top of a tee. The quadratic equation y=-5x^2 + 20x + 0.05 describes its height,y, in metres as time,x, in seconds passes. Determine how long the ball is in the air. Thanks for the help
Click here to see answer by MathTherapy(10552)  |
Question 1183271: Gemma's mother owns a manufacturing company that produces key rings. Last year, she collected data about the
number of key rings produced per day and the corresponding profit. The data can be modeled by the relation
π· = βππ^π + πππ β ππ, where π· is the profit in thousands of dollars and π is the number of key rings in
thousands. You must solve the following questions by factoring.
a) How many key rings must be produced so that there is no profit and no loss [π· = π]?
b) How many key rings must be produced for the maximum profit?
c) What is the maximum profit?
Click here to see answer by ikleyn(52781) |
Question 1183271: Gemma's mother owns a manufacturing company that produces key rings. Last year, she collected data about the
number of key rings produced per day and the corresponding profit. The data can be modeled by the relation
π· = βππ^π + πππ β ππ, where π· is the profit in thousands of dollars and π is the number of key rings in
thousands. You must solve the following questions by factoring.
a) How many key rings must be produced so that there is no profit and no loss [π· = π]?
b) How many key rings must be produced for the maximum profit?
c) What is the maximum profit?
Click here to see answer by greenestamps(13200)  |
Question 1183269: A baseball player throws a baseball from a height of 1 m above the ground and its height is given by the equation π = βπ.2t^π + ππ.πt + π, where π is the height in metres above the ground, and t, in seconds, is its time in the air [see the image below]. When, to the nearest tenth of a second, will the ball hit the ground? You must solve by factoring
This is the image https://giannepaulaperalta.files.wordpress.com/2018/07/3075613-6448579381.jpg
Click here to see answer by ikleyn(52781) |
Question 1183270: Kim owns a square piece of land with a side length of 'a' metres. He extends his property by purchasing adjacent land so that the length is increased by ππ π and the width by ππ π. Write the simplified algebraic expression for
the area of Kimβs extended property. Provide a simplified response. You must solve by expanding. Thanks for the help. Appreciate it
Click here to see answer by ikleyn(52781) |
Question 1183273: Pls help with this. Thanks. Factoring is an algebraic process, which is an essential one in the field of mathematics. Consider the following equation: y= x^2 + 2x - 8. This equation in factored form can be written as: y=(x-2)(x+4). Explain using words and algebra, how the zeros, the axis of symmetry, and the vertex can be obtained.
Click here to see answer by Solver92311(821)  |
Question 1183273: Pls help with this. Thanks. Factoring is an algebraic process, which is an essential one in the field of mathematics. Consider the following equation: y= x^2 + 2x - 8. This equation in factored form can be written as: y=(x-2)(x+4). Explain using words and algebra, how the zeros, the axis of symmetry, and the vertex can be obtained.
Click here to see answer by MathTherapy(10552) |
Question 1183273: Pls help with this. Thanks. Factoring is an algebraic process, which is an essential one in the field of mathematics. Consider the following equation: y= x^2 + 2x - 8. This equation in factored form can be written as: y=(x-2)(x+4). Explain using words and algebra, how the zeros, the axis of symmetry, and the vertex can be obtained.
Click here to see answer by ikleyn(52781) |
Question 1183278: I need help with this please. A baseball player throws a baseball from a height of 1 meter above the ground and its height is given by the equation π = βπ. ππ^π + ππ.ππ + π, where π is the height in metres above the ground, and t, in seconds, is its
time in the air [see the image below]. When, to the nearest tenth of a second, will the ball hit the ground? This is the image https://giannepaulaperalta.files.wordpress.com/2018/07/3075613-6448579381.jpg (you could pls copy and paste the link on a new tab). Also responding to the tutor that asked if I created this question on my own. To answer that no I didn't. This is a question from my assignments given to me by my teacher.
Click here to see answer by ikleyn(52781) |
Question 1183277: Pls help. The amount of money that a local charity earns by selling T-shirts at a mall
depends on the price of each T-shirt. The monthly profit,y, in dollars is given by the quadratic equation y=-35x^2 + 1250x - 6500 where,x,represents the price of each T-shirt.
a) Determine the roots of the equation
b) Determine the vertex of the parabola.
c) Draw a sketch of the relationship. Label the axes and the vertex
d) Under what circumstances will the charity maximize its profit (make the most money)?
e) Describe the significance of the roots in terms of the graph and in terms of the charityβs venture
f) Determine the range of prices that the charity could consider, in order to
make a monthly profit of at least $3000
Click here to see answer by josgarithmetic(39617) |
Question 1183277: Pls help. The amount of money that a local charity earns by selling T-shirts at a mall
depends on the price of each T-shirt. The monthly profit,y, in dollars is given by the quadratic equation y=-35x^2 + 1250x - 6500 where,x,represents the price of each T-shirt.
a) Determine the roots of the equation
b) Determine the vertex of the parabola.
c) Draw a sketch of the relationship. Label the axes and the vertex
d) Under what circumstances will the charity maximize its profit (make the most money)?
e) Describe the significance of the roots in terms of the graph and in terms of the charityβs venture
f) Determine the range of prices that the charity could consider, in order to
make a monthly profit of at least $3000
Click here to see answer by ikleyn(52781) |
Question 1183274: The standard test for the HIV virus is the ELISA test, which tests for the presence of HIV antibodies. If an individual does not have the HIV virus, the test will come back negative for the presence of HIV antibodies 99.7% of the time and will come back positive for the presence of HIV antibodies 0.3% of the time (a false positive). If an individual has the HIV virus, the test will come back positive 99.7% of the time and will come back negative 0.3% of the time (a false negative). Approximately 0.67% of the world population has the HIV virus. What is the probability that a randomly selected individual has the HIV virus if the test comes back positive?
Click here to see answer by ikleyn(52781) |
Question 1183282: when a cube is completely submerged in a cylindrical jar of radius 3.5 cm containing water to a height of 8 cm, the water level rises by 4mm.calculate the length of one side of the cube correct to 4 significant figure
Click here to see answer by ikleyn(52781) |
Question 1183284: when a cube is completely submerged in a cylindrical jar of radius 3.5 cm containing water to a height of 8 cm, the water level rises by 4mm.calculate the length of one side of the cube correct to 4 significant figure.take n=22/7
Click here to see answer by ikleyn(52781) |
Question 1182871: 1.
The disposable income of Mehta family increases from Rs 5000 to Rs 15,000. As a result, the familyβs demand for milk and milk goods has increased from 30 liters to 60 liters per month. Calculate the income elasticity of demand.
2.
A drop in the price of lemons from Rs 100 per kg to Rs 60 Per Kg increases the quantity demanded from 1.75 to 7 kg per week. Calculate the price elasticity of demand.
Click here to see answer by Theo(13342)  |
Question 1183116: A newscaster earns $32,200 and wants to invest 10% of his/her monthly salary to save for retirement in 24 years. If he/she invests this money at 5.9% compounded monthly, how much money will he/she have at retirement? A. How much will be saved each year? B. What will be the monthly deposit? C. What will be the amount in the account after 24 years?
Click here to see answer by Theo(13342) |
Question 1183291: Heart failure is due to either natural occurrences (87%) or outside factors (13%) Outside factors are related to induced substances or foreign objects. Natural occurrences are caused by arterial blockage, disease, and infection. Assume that causes of heart failure for the individuals are independent.
(a) What is the probability that the first patient with heart failure who enters the emergency room has the condition due to outside factors?
(b) What is the probability that the third patient with heart failure who enters the emergency room is the first one due to outside factors?
(c) What is the mean number of heart failure patients with the condition due to natural causes who enter the emergency room before the first patient with heart failure from outside factors?
Click here to see answer by Boreal(15235)  |
Question 1183301: The amount of money that a local charity earns by selling T-shirts at a mall
depends on the price of each T-shirt. The monthly profit,y, in dollars is given by the quadratic equation y=-35x^2 + 1250x - 6500 where,x,represents the price of each T-shirt.
d) Under what circumstances will the charity maximize its profit (make the most money)?
e) Describe the significance of the roots in terms of the graph and in terms of the charityβs venture
f) Determine the range of prices that the charity could consider, in order to
make a monthly profit of at least $3000. Thanks for the help
Click here to see answer by Boreal(15235) |
Question 1183320: the angles of elevation of the top of a cliff from two boats A and B on the same side of the cliff and on the same horizontal level with the foot of the distance are 30^0 and 50^0 respectively.if the distance of the foot of the cliff to boat B is 30m, find by scale drawing
Click here to see answer by ikleyn(52781) |
Question 1183345: I am really struggling with this problem, I got help from a math tutor and we could not figure it out, I believe we used the annuity formula. Please can someone help me with it?
Suppose you invest $160 a month for 5 years into an account earning 9% compounded monthly. After 5 years, you leave the money, without making additional deposits, in the account for another 25 years. How much will you have in the end?
$
Suppose instead you didn't invest anything for the first 5 years, then deposited $160 a month for 25 years into an account earning 9% compounded monthly. How much will you have in the end?
Click here to see answer by Solver92311(821) |
Question 1183307: A computer system uses passwords that are exactly six characters and each
character is one of the 26 letters (a - z) or 10 integers (0 - 9). Suppose that 10,000 users
of the system have unique passwords. A hacker randomly selects (with replacement)
one billion passwords from the potential set, and a match to a userβs password
is called a hit.
(a) What is the distribution of the number of hits?
(b) What is the probability of no hits?
(c) What are the mean and variance of the number of hits?
Click here to see answer by Boreal(15235) |
Question 1179167: The mean life satisfaction for 142 countries around the world in 2016 (on a scale from 0 - 10) was 5.4. A sample of 46 countries taken in 2018 showed a mean of 5.6 with a standard deviation of 1.1. Is the mean life satisfaction for the 2018 sample significantly higher than the mean life satisfaction in 2016? Conduct the appropriate hypothesis test using Ξ± = 0.01.
What is the standard deviation?
please show steps!
Click here to see answer by robertb(5830) |
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