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MATH SOLVE
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A cereal company puts toys into 40% of its cerealboxes. Lydia wants to know what the probability isof getting 2 toys if she buys 7 boxes of cereal. Howcould she simulate her question using a randomnumber table?a. Look at the first 2 digits in the table. Let digitsfrom 0 to 7 represent getting a toy, and otherdigits represent not getting a toy.b. Look at the first 7 digits in the table. Let digitsfrom 1 to 3 represent getting a toy, and otherdigits represent not getting a toy.c. Look at the first 7 digits in the table. Let digitsfrom 0 to 3 represent getting a toy, and otherdigits represent not getting a toy.d. Look at the first 2 digits in the table. Let digitsfrom 1 to 7 represent getting a toy, and otherdigits represent not getting a toy.
General
2 months ago
The quadratic formula is used to solve for ???? in equations taking the form of a quadratic equation, ????????2+????????+????=0. quadratic formula:????=−????±√(????^2−4????????)/2????. Solve for ???? in the expression using the quadratic formula. 2????^2+31????−6.1=0. Use at least three significant figures in each answer.
General
2 months ago
According to a recent study, some experts believe that 22.22% of all freshwater fish in a particular country have such high levels of mercury that they are dangerous to eat. Suppose a fish market has 150 fish we consider randomly sampled from the population of edible freshwater fish. Use Central Limit Theorem (and the Empirical rule) to find the approximate probability that the market will have a proportion of fish with dangerously high level of mercury that is more than two standard errors above 0.20.You can use Central Limit Theorem because the fish were randomly sampled; the population is more than 10 times 250; and np is 50, and n(1-p) is 200, and both are more than 10.
General
2 months ago
The campus of a college has plans to construct a rectangular parking lot on land bordered on one side by a highway. There are 680 ft of fencing available to fence the other three sides. Let x represent the length of each of the two parallel sides of fencing. A rectangle has width x. x x (a) Express the length of the remaining side to be fenced in terms of x. (b) What are the restrictions on x? (c) Determine a function A that represents the area of the parking lot in terms of x. (d) Determine the values of x that will give an area between 20 comma 000 and 50 comma 000 ftsquared. (e) What dimensions will give a maximum area, and what will this area be?
General
2 months ago
finding the exact value of tan Theta for an angle Theta with sine theta equals 5/6 and its terminal side in quadrant 2
General
2 months ago
The mean height of a certain kind of plant is 171 centimeters. Suppose we want to carry out a hypothesis test to see if the mean height when these plants are treated with a certain chemical differs from 171. State the null hypothesis and the alternative hypothesis that we would use for this test.
General
2 months ago
A company manufactures tennis balls. When its tennis balls are dropped onto a concrete surface from a height of 100 inches, the company wants the mean height the balls bounce upward to be 55.4 inches. This average is maintained by periodically testing random samples of 25 tennis balls. If the t-value falls between minus−t 0.90 and t 0.90, then the company will be satisfied that it is manufacturing acceptable tennis balls. A sample of 25 balls is randomly selected and tested. The mean bounce height of the sample is 56.6 inches and the standard deviation is 0.25 inch. Assume the bounce heights are approximately normally distributed. Is the company making acceptable tennis balls?
General
2 months ago
A certain board game uses tokens made of transparent colored plastic. Each token looks like where each of the four different regions is a different color: either red, green, yellow, blue, orange, purple, or black. How many different tokens of this type are possible? (Note: The white circle is a region.)
General
2 months ago
The Precision Scientific Instrument Company manufactures thermometers that are supposed to give readings of 0 degrees Celcius at the freezing point of water. Tests on a large sample of these thermometers reveal that at the freezing point of water, some give readings below 0 degrees celcius (denoted by negative numbers) and some give readings above 0 degrees celcius (denoted by positive numbers).Assume that the mean reading is 0 degrees celcius and the standard deviation of the readings is 1.00 degrees celcius. Also assume that the frequency distribution of errors closely resembles the normal distribution. A thermometer is randomly selected and tested. Find the temperature reading corresponding to the given information.If 7% of the thermometers are rejected because they have readings that are too low, but all other thermometers are acceptable, find the temperature that separates the rejected thermometers from the others. I know the answer, but do not how to solve the problem. answ-->-1.48 Find the z-value with a left tail of 7%:invNorm(0.07) = -1.48Find the termperature deviation that corresponds to that z-value:x = z*s + ux = -1.48*1 + 0 = -1.48
General
2 months ago
find the value of a so that the point (3,a) lies on the line represented by 2x-3y=5
General
2 months ago
An assembler of electric fans uses motors from three sources. Company A supplies 30%, company B supplies 40% and company C supplies the rest. The defect rates are as follows: 10% of the motors from company A are defective and 20% of the motors from company B are defective, and 15% of the motors from company C are defective. If a motor is found to be good, what is the probability it came from company B?
General
2 months ago
A limnologist wishes to estimate the mean phosphate content per unit volume of lake water. It is knownfrom studies in previous years that the standard deviation has a fairly stable value ofσ= 4. How manyindependent water samples must the limnologist analyze to be 90% certain that the error of estimation [halfwidth of 90% confidence interval] does not exceed 0.8 milligrams?
General
2 months ago
A psychologist is collecting data on the time it takes to learn a certain task. For 50 randomly selected adult subjects, the sample mean is 16.40 minutes and the sample standard deviation is 4.00 minutes. Construct the 95 percent confidence interval for the mean time required by all adults to learn the task. Assume that X, the time to learn a task, is distributed normally.
General
2 months ago
Match each number in scientific notation with the number written in standard form and in a step by step process.6.82 x 10^7 0.000006826.82 x 10^-6 6,820,0006.82 x 10^6 68,200,000
General
2 months ago
Suppose r varies directly as the square of m, and inversely as s. If r equals 11 when m equals 6 and s equals 4, find r when m equals 12 and s equals 4.
General
2 months ago
Malia and John each bought 2 pounds of sunflower seeds each ate some seeds Malia has 1 1/3 left and John has 1 2/5 pounds left who ate more sunflower seeds
General
2 months ago
what is 0.91 meter equal to 1 what?
General
2 months ago
PLEASE SOMEONE DO THIS ILL MARK YOU THE SMARTEST!3. (a) What steps did Chandragupta take tounite his empire? (b) How did Asoka's rulediffer from that of his grandfather?
General
2 months ago
Given these results, does it seem that the candy company is providing consumers with the amount claimed on the label? ▼ because the probability of getting a sample mean of 0.8537 g or greater when 456 candies are selected ▼ is is not exceptionally small.
General
2 months ago
A group of six software packages available to solve a linear programming problem has been ranked from 1 to 6 (best to worst). An engineering firm, unaware of the rankings, randomly selected and then purchased two of the packages. Let Y denote the number of packages purchased by the firm that are ranked 3, 4, 5, or 6. Give the probability distribution for Y.
General
2 months ago
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