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Nine percent of americans say they are well informed about politics in comparison to most people. You randomly sample 200 americans and ask if they believe that they are well informed about politics in comparison to most people. What is the probability that less than 8% of the people sampled will answer yes to the question?
General
5 months ago
Write a decimal that has at least 3 digits to the right of the decimal point.Write the expanded form and the word form for the number
General
5 months ago
Let m(x) = x / x−1a. Find the inverse of m.b. Graph m. How does the graph of m explain why this function is its own inverse?c. Think of another function that is its own inverse.
General
5 months ago
2. The number 1 is a zero of the polynomial p(x)=x^3−3x^2+7x−5. a. Write p(x) as a product of linear factors.b. What are the solutions to the equation x^3−3x^2+7x−5=0?
General
5 months ago
An investor has 75,000 to invest in a CD and a mutual fund. The CD yields 6% and the mutual fund yields 8%. The mutual fund requires a minimum investment of $8,000, and the investor requires that at least twice as much should be invested in CDs as in the mutual fund. How much should be invested in CDs and how much in the mutual fund to maximize the return? What is the maximumreturn?
General
5 months ago
Explain how to use the unit rate to make the tablein the example.
General
5 months ago
Henry has a reading list of 10 books that he can choose from to read this week. Identify the constraint for the number of books Henry can read the week.
General
5 months ago
What is 6.58 divided by 0.9 long division round to the nearest tenth
General
5 months ago
5 - m = 13 what is the value of m
General
5 months ago
Find the volume of the pyramid. Write your answer as a fraction or mixed number.
General
5 months ago
The attention span of children (ages 3 to 5) is claimed to be Normally distributed with a mean of 15 minutes and a standard deviation of 4 minutes. A test is to be performed to decide if the average attention span of these kids is really this short or if it is longer. You decide to test the hypotheses H0: μ = 15 versus Ha: μ > 15 at the 5% significance level. A sample of 10 children will watch a TV show they have never seen before, and the time until they walk away from the show will be recorded. At a significance level of 5%, the decision rule would be to reject the null hypothesis if the observed sample mean is greater than __________________ minutes.
General
5 months ago
A triangular colourful scenery is made in a wall with sides 50 cm, 50 cm and 80 cm. A golden thread is to hang from the vertex so as to just reach the side 80 cm. How much length of golden thread is required ?
General
5 months ago
A welder drops a piece of red-hot steel on the floor. The initial temperature of the steel is 2,500 degrees Fahrenheit. The ambient temperature is 80 degrees Fahrenheit. After 2 minutes the temperature of the steel is 1,500 degrees. The function f(t)=Ce(−kt)+80 represents the situation, where t is time in minutes, C is a constant, and k is a constant.After 2 minutes the temperature of the steel is 1,500 degrees. After how many minutes will the temperature of the steel be 100 degrees and therefore safe to pick up with bare hands?
General
5 months ago
16 is 10% of what number
General
5 months ago
The Toylot company makes an electric train with a motor that it claims will draw an average of only 0.8 ampere (A) under a normal load. A sample of nine motors was tested, and it was found that the mean current was x = 1.32 A, with a sample standard deviation of s = 0.44 A. Do the data indicate that the Toylot claim of 0.8 A is too low? (Use a 1% level of significance.)
General
5 months ago
The Scottsdale fire department aims to respond to fire calls in 4 minutes or less, on average. Response times are normally distributed with a standard deviation of 1 minute. Would a sample of 18 fire calls with a mean response time of 4 minutes 30 seconds provide sufficient evidence to show that the goal is not being met at α = .01?
General
5 months ago
The table and the equation show show the approximate speeds for a roadrunner and a coyote running at top speed. Which animal runs faster? How much faster per minute? ( 1 mile=5,280 feet, 1 minute= 60seconds
General
5 months ago
the cost of renting a scooter is represented by 3j+5. Write and simplify an expression that represents the cost of renting 6 scooters.
General
5 months ago
A football game was played between team a and team b. The two teams scored a total of 41 points and team a won by a margin of 15 points. How many points did team b score?
General
5 months ago
The New Haven High School cheerleaders got a t-shirt gun. The cheerleaders standon the track, and shoot the t-shirts up in the air.The quadratic function that models the height (in feet) of the t-shirt after a certainamount of time (in seconds) is:h(t) = –16ť+ 64+ + 4How high is the gun being held when it is fired?
General
5 months ago
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