111 Answered Questions for the topic Mathmatics

11/17/15

Find a 90% confidence interval for the population average startup costs µ for candy store franchises

Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you can probably get a bank loan on startup costs for franchises such as... more

11/17/15

Compute 95% and 99% confidence intervals for µ using Method 1 with a Student's t distribution!

When σ is unknown and the sample is of size n ≥ 30, there are two methods for computing confidence intervals for μ. Method 1: Use the Student's t distribution with d.f. = n − 1. This is the... more

11/17/15

A farm brings 15 tons of watermelon to market. Find a 90% confidence interval for the population mean cash value of this crop. What is the margin of error? Hint

What price do farmers get for their watermelon crops? In the third week of July, a random sample of 38 farming regions gave a sample mean of x = $6.88 per 100 pounds of watermelon. Assume that σ is... more

11/13/15

In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the request

It is estimated that 3.2% of the general population will live past their 90th birthday. In a graduating class of 737 high school seniors, find the following probabilities. (Round your answers to... more
Mathmatics Math Word Problem

09/30/15

what is the standard form?

the number is four million, two hundred sixteen thousand, ninety?
Mathmatics

09/27/15

a party of hikers stops for a rest 101 meters below the rim.then they descend another 52 meters.what is their new altitude

The surface ,or rim ,of a canyon is at an altitude of58 meters.on a hike down into the the canyon;a party of hikers stops for a fest 101 meters below the rim?then they descend 52 meters. what is... more

06/24/15

Find the value of k such that the system of linear equations is inconsistent.

Find the value of k such that the system of linear equations is inconsistent.6x + 2y = 8−9x + ky = −11   k=?

06/24/15

Word problem, Math, Matrix unit

"In a football game, Team A defeated Team B by a score of 28 to 10. The total points scored came from a combination of touchdowns, extra-point kicks, and field goals, worth 6, 1, and 3 points,... more

06/23/15

Physics: mechanical advantage? (multiple choice)

What is the mechanical advantage of a claw foot hammer having a handle with a length of 45 cm and head length of 10 cm? a. 1/9 b. 2/9 c. 2/5 d. 5/2 e. 9/2 f. 9/1
Mathmatics Math Physics Mass

06/23/15

Physics: Angular velocity (multiple choice)

At a dilapidated playground, people have stolen the support bar to a merry-go-round leaving a flat disk that can rotate freely. While pondering conservation of angular momentum, a curious physics... more
Mathmatics Math Physics Velocity

06/19/15

Physics: Bernoulli’s principle with pressure and velocity (multiple choice)

Driving slowly down a two-lane highway a large transport truck passes me going the same way as I am. As he does physics flashes before my eyes, and I think Bernoulli’s principle with pressure and... more
Mathmatics Math Physics Mass

06/19/15

Physics: Conceptual Question (angular momentum)

At a dilapidated playground, people have stolen the support bar to a merry-go-round leaving a flat disk that can rotate freely. While pondering conservation of angular momentum, a curious physics... more
Mathmatics Math Physics Velocity

06/18/15

Physics: multiple choice (Density and buoyancy)

In considering density and buoyancy, a helium balloon floats in air even as wood floats on water. A father was bringing home balloons for a party and had attached the balloons to the seat of a van... more
Mathmatics Math Physics Time

06/18/15

Physics: What is the tangential velocity, and how many revolutions?

The new blade on my table saw has a radius of 15.0 cm. My table saw has a maximum speed of 3750 rpm. If it takes 2.50 seconds to get up to this final speed, what is the tangential velocity of the... more
Mathmatics Math Physics Time

06/18/15

Physics: What is her momentum of Inertia?

A figure skater can increase her angular velocity from a speed of 2.00 revolutions in 3.00 seconds to 5.00 revolutions in 2.00 seconds by bringing her arms in. If her moment of inertia was 4.60 kg... more
Mathmatics Math Physics Mass

06/18/15

Physics: What is the density of the unknown liquid?

A 85.0 g bottle is filled half full with 1.00 L of water. It is filled the rest of the way will an unknown liquid. The total mass of this full bottle is 1.75 kg, what is the density of the unknown... more
Mathmatics Math Physics Mass

06/18/15

Physics: How many 15.0 gram metal army men could you safely float on a piece of wood

A typical piece of wood has a density of 750 kg/m3. How many 15.0 gram metal army men (or Barbies - your preference) could you safely float on one such piece of wood having a mass of 1.25 kg, in a... more

04/21/15

What must you score in the 2nd exam to get an overall 40% in the module.

There are 2 exams in one module. One exam is worth 30% the other is worth 70% of the overall grade.You score 60% in the exam worth 30%.What must you score in the 2nd exam to get an overall 40% in... more
Mathmatics

04/01/15

Solve the following system of equations using the substitution method.

x=y+6 4x+y=14     The solutions is___.(Type an order pair.)

10/02/14

A student gets paid to deliver newspaper after school. She earns $25 a day, plus an extra $0.75 for each newspaper

A student gets paid to deliver newspaper after school. She earns $25 a day, plus an extra $0.75 for each newspaper she delivers and $5 for each new customer she signs up for delivery. If d=days,... more
Mathmatics Math Inequalities Graphs

09/29/14

The parabola is a graph of the equation y = (x-1)^2 - 3 which point will satisfy the inequality

The parabola is a graph of the equation y = (x-1)^2 - 3 which point will satisfy the inequality y<(x-1)^2 - 3?   A.) (1,0) B.) (5,3) C.) (2,5) D.) (0,5)

09/29/14

Which of the following ordered pairs should be tested to determine

Which of the following ordered pairs should be tested to determine which side to shade when graphing the inequality y> 5x + 1 ?   A.) A point on the line y= 5x + 1   B.) Two points above the... more
Mathmatics Math Algebra 2 Math Help

09/23/14

What is the result of isolating y^2 in the equation below? (x+6)^2 + y^2 = 1

What is the result of isolating y^2 in the equation below?(x+6)^2 + y^2 = 1   A.) y^2 = -x^2 - 12x -35 B.) y^2 = x^2 + 12x + 37C.) y^2 = -x^2 - 35D.) y^2 = x^2 + 37
Mathmatics Math Math Help Alegbra 2

09/22/14

How many times does the quadratic function below intersect the x-axis?

How many times does the quadratic function below intersect the x-axis?   y= x^2 + 10x +25   A.) 2   B.) 3   C.) 1   D.) 0
Mathmatics Math Math Help Alegbra 2

09/22/14

Which of the following would be the most logical first step to solving this quadratic equation?

Which of the following would be the most logical first step to solving this quadratic equation?x^2 - 4x + 16 = 2A.) Subtract 2 from both sides.B.) Divide both sides by xC.) Take the square root of... more

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