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MATH SOLVE
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Monitors manufactured by TSI Electronics have life spans that have a normal distribution with a standard deviation of 1200 hours and a mean life span of 18,000 hours. If a monitor is selected at random, find the probability that the life span of the monitor will be more than 16,800 hours. Round your answer to four decimal places.
General
2 months ago
Who calculated the volume of a sphere by comparing it to a cylinder? Pythagoras Euclid Archimedes Socrates
General
2 months ago
Assume that trees are subjected to different levels of carbon dioxide atmosphere with 4% of the trees in a minimal growth condition at 340 parts per million (ppm), 11% at 460 ppm (slow growth), 47% at 540 ppm (moderate growth), and 38% at 650 ppm (rapid growth). What is the mean and standard deviation of the carbon dioxide atmosphere (in ppm) for these trees?
General
2 months ago
Aki's Bicycle Design has determined that when x hundred bicycles are built, the average cost per bicycle =0.9x^2-1.7x+10.861, when C(x) is in hundreds of dollars. How many bicycles should the shop build to minimize the average cost per bicycle?C(x)=0.9x^2-1.7x+10.861 =C(x)=0.9(x^2-1.889x)+10.861=My question is how do they come up with the 1.889 in the equation?
General
2 months ago
An English teacher has been teaching a sixth grade composition class for many years. He has the feeling that over the past several years, the writing ability of students has changed. A national test of proficiency in composition was administered 5 years ago. The resulting distribution of scores was normally shaped, had a mean of 85 and a standard deviation of 10.9. In order to test his feeling, he gives his present class of 43 students the same proficiency test. The resulting mean is 80 and the standard deviation is 8.7. Using the z test with α= 0.052 tail, the appropriate critical value is______?
General
2 months ago
Karen earns $40,000 a year. What is her monthly income she can use for budgeting? Question 4 options: $26,000 $4,000 $480,000 $3,333
General
2 months ago
(05.01 LC)A right triangle ABC is shown below:A right triangle ABC with height AB labeled 4 units and base BC labeled 5 units is shown.The area of the triangle above will equal one half of a rectangle that is 5 units long and __ units wide. (Input only whole numbers, such as 8.)
General
2 months ago
Enter your answer and show all the steps that you use to solve this problem in the space provided. Find the values of x and y.
General
2 months ago
A nutritionist in a large company’s cafeteria has a guideline saying employees’ daily zinc intake should be about 14 mg/day. She selects a simple random sample of 70 employees and measures their zinc intake for one day. She finds their average intake is 13.8 mg. Earlier studies suggest that the population standard deviation of intakes is about 0.9 mg.(a) Run a test, using significance level α = 0.05, to decide whether these data are stong evidence that the whole company population of employees took in too little zinc that day.• Hypotheses:• Assumptions:• Test statistic:• p-value:• Conclusion:(b) Suppose the population mean really was 14. Before sampling, what was the probability the test would reject H0 : µ = 14 even though it is true? Which type of error is this?
General
2 months ago
A news agency publishes results of a recent poll. It reports that candidate A leads candidate B by 10% because 45% of the poll participants supported Ms. A whereas only 35% supported Mr. B. What margin of error should be reported for each of the listed estimates, 10%, 35%, and 45%? Notice that 900 people participated in the poll, and the reported margins of error typically correspond to 95% confidence intervals.
General
2 months ago
Tali started a pool cleaning business. She purchased cleaning supplies and charged the same amount for each pool cleaned. The expression −243+24x represents the profit Tali has earned from cleaning pools.Which expression represents the total amount Tali earns from pool cleaning?24x24−243x
General
2 months ago
Is this function even, odd, or neither?
General
2 months ago
brainliestttttttttWhich of the following is not a way to represent the solution of the inequality 8x − (5x + 4) greater than or equal to −31? x greater than or equal to −9 −9 less than or equal to x A number line with a closed circle on −9 and shading to the left A number line with a closed circle on −9 and shading to the right
General
2 months ago
Why do you subtract exponents when dividing powers with the same base
General
2 months ago
Five classmates came to Dan’s birthday party. This is half as many as the number of his summer camp friends who came and one third of the number of his relatives that came. How many people were at Dan’s birthday party?
General
2 months ago
Mika’s gym allows her to bring 3 guests for free. After the first three, she must pay $7 per guest. How many guests, g, can she bring to the gym if she pays $42? Three of these equations give the correct value of g. Which equation does NOT? 7g = 63 7(g – 3) = 42 7g – 3 = 42 g = 9
General
2 months ago
Find x value for the point that splits segment CD in half if point C is located at (−2, 4) and point D is located at (3, 7).
General
2 months ago
a wallet that holds $25 contains the same number of $1 bills, $5 bills, and quarters. how many of each type of bill or coin does the wallet contain?
General
2 months ago
BRAINLIESTTTTTTT!1. A fuel is purified by passing it through a clay pipe. Each foot of the clay pipe removes a fixed percentage of impurities in the fuel. Let f(x) represent the amount of pollutants, in tons, left in the fuel after it had passed through x feet of the clay pipe.f(x) = 10(0.8)^xWhat does the number 0.8 represent? Every foot of the pipe keeps 80% of the pollutant. Every foot of the pipe removes 80% of the pollutant. The original amount of pollutant present in the fuel was 80 tons. The original amount of pollutant present in the fuel was 20 tons.2. Choose the equation below that represents the line passing through the point (2, −4) with a slope of one half. y = one halfx + 5 y = one halfx − 3 y = one halfx − 5 y = one halfx + 3
General
2 months ago
Balu and Pumba shared ½ of a cake. Balu got to eat twice as much cake as Pumba. What fraction of the whole cake did Balu eat?
General
2 months ago
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