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A transistor radio uses 2 amps of current when it is run by a 9 volt battery. What is the resistance in the radio circuit
General
4 months ago
Solve:-22x - 9 - 7 = -5x + 1 - 33x + 63
General
4 months ago
Dorothy is using fabric to cover a photo album the width of the fabric is 5/8 of a yard the area of the fabric is 5/16 square yards what is the length of the fabric
General
4 months ago
The Economic Policy Institute periodically issues reports on wages of entry level workers. The Institute reported that entry level wages for male college graduates were $21.68 per hour and for female college graduates were $18.80 per hour in 2011 (Economic Policy Institute website, March 30, 2012). Assume the standard deviation for male graduates is $2.30, and for female graduates it is $2.05What is the probability that a sample of 50 male graduates will provide a sample mean within $.50 of the population mean, $21.68?What is the probability that a sample of 50 female graduates will provide a sample mean within $.50 of the population mean, $18.80?What is the probability that a sample of 120 female graduates will provide a sample mean more than $.30 below the population mean?
General
4 months ago
The World Health Organization is planning a study of the average weight gain of Europeans in the last 5 years. Scientists from the WHO plan on taking a SRS of 100 Europeans and calculating a 95% confidence interval of the average weight gain μ of all Europeans. The WHO changed their minds and now plans on calculating a 90% confidence interval from the sample they will select. Explain to the WHO the impact of changing their confidence level from 95% to 90%.Their confidence interval would be less likely to capture the sample mean.They would decrease the margin of error of their confidence interval if they calculated a 90% rather than a 95% confidence interval. The probability of selecting a sample which doesn't capture the true value of μ would be 10% rather than 5% if they decide to calculate a 90% confidence interval rather than a 95% confidence interval from the sample they will select
General
4 months ago
A rainstorm in Portland, Oregon, has wiped out the electricity in about 10% of the households in the city. A management team in Portland has a big meeting tomorrow, and all 6 members of the team are hard at work in their separate households, preparing their presentations. What is the probability that none of them has lost electricity in his/her household? Assume that their locations are spread out so that loss of electricity is independent among their households. Round your response to at least three decimal places.
General
4 months ago
The Environmental Protection agency requires that the exhaust of each model of motor vehicle be tested for the level of several pollutants. The level of oxides of nitrogen (NOX) in the exhaust of one light truck model was found to vary among individually trucks according to a Normal distribution with mean 1.45 grams per mile driven and standard deviation 0.40 grams per mile. (a) What is the 99th percentile for NOX exhaust, rounded to four decimal places? (b) Find the interquartile range for the distribution of NOX levels in the exhaust of trucks rounded to four decimal places.
General
4 months ago
An English teacher needs to pick 10 books to put on his reading list for the next school year, and he needs to plan the order in which they should be read. He has narrowed down his choices to 4 novels, 7 plays, 7 poetry books, and 3 nonfiction books. Step 1 of 2 : If he wants to include no more than 2 plays, how many different reading schedules are possible? Express your answer in scientific notation rounding to the hundredths place.
General
4 months ago
Write a real world situation that could be modeled by the creation 100 minus 6X equals 160-10 X
General
4 months ago
Peter is buying office supplies he is able to buy three packages of paper in for staplers for $40 or he is able to buy five packages of paper and six staplers for $62 how much does a package of paper cost how much does a stapler cost
General
4 months ago
11. What other information do you need to prove the triangles congruent using the AAS Congruence Postulate?BAC=DACAV=ADAB=ADCBA=CDA
General
5 months ago
The difference of the squares of two positive consecutive even integers is 20 . find the integers. use the fact that, if x represents an even integer, then xplus 2 represents the next consecutive even integer.
General
5 months ago
Math quest after a winter storm, the depth of the snow on cherry street was 10 \text{ cm}10 cm10, space, c, m. but then, the snow started melting at a rate of \dfrac{1}{3} \text{ cm}31 cmstart fraction, 1, divided by, 3, end fraction, space, c, m per hour.what was the depth of the snow on cherry street after 333 hours?
General
5 months ago
The floor of a conference hall can be covered completly with tiles.Its length is 36ft. longer than its width.The area of the floor is less than 2040square ft.How would you represent the with of the floor?How about its lenght?What mathematical sentence would represent the given situation?What are the possible dimensions of the floor?How about the possible areas of the floor?Would it be realistic for the floor to have an area of 144sq.ft?Explain your answer.
General
5 months ago
Identify the transformation that maps the figure onto itself.
General
5 months ago
The shortest known adult woman is about 24 inches tall and tallest known adult woman is about 92 inches tall. Write an absolute value equation that represents the minimum and maximum heights. Use x to represent the heights.
General
5 months ago
write the number of significant digits in 25.04
General
5 months ago
Bobby knows that the perimeter of the original rectangle is 120 meters. He also knows that the perimeter of the reduced rectangle is 30 meters and the reduced length is 9 meters. Not drawn to scale What is the width of the original rectangle?
General
5 months ago
Your car is skidding to a stop from a high speed. you may want to review ( pages 112 - 114) . part a identify all forces acting on the object.
General
5 months ago
A student earned grades of C,A,B, and A. Those courses had these corresponding credit hours: 4,6,1, and 6. The grading system assigns quality points to letter grades as follows: A=4, B=3, C=2, D=1, and F=0. Compute the grade point average (GPA) and round the result to two decimal places.
General
5 months ago
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