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MATH SOLVE
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Suppose that the height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. After 11 hours of burning, a candle has a height of 27.8 centimeters. After 26 hours of burning, its height is 24.8 centimeters. What is the height of the candle after 23 hours?
General
4 months ago
Which graph represents the line 10x+5y=20?
General
4 months ago
Cynthia had a credit card with a 17% APR and a $3,265 balance. She had budgeted to have the credit card paid off in 24 months. But after missing a single monthly payment, Cynthia’s credit card company has increased her interest rate to 21%. How much extra will Cynthia have to pay in finance charges (interest) because of the increase in her APR if she still pays off the credit card in 24 months?
General
4 months ago
A bag of 26 tulip bulbs contains 10 red tulip bulbs, 9 yellow tulip bulbs, and 7 purple tulip bulbs. (a) What is the probability that two randomly selected tulip bulbs are both red? (b) What is the probability that the first bulb selected is red and the second yellow? (c) What is the probability that the first bulb selected is yellow and the second red? (d) What is the probability that one bulb is red and the other yellow?
General
4 months ago
A waitress sold 15 ribeye steak dinners and 18 grilled salmon dinners, totaling $559.81 on a particular day. Another day she sold 19 ribeye steak dinners and 9 grilled salmon dinners, totaling 583.66. How much did each type of dinner cost?
General
4 months ago
A machine that produces a major part for an airplane engine is monitored closely. In the past, 10% of the parts produced would be defective. With a .95 probability, the sample size that needs to be taken if the desired margin of error is .04 or less is
General
4 months ago
Consider the following binomial experiment: A study in a certain community showed that 8% of the people suffer from insomnia. If there are 10,400 people in this community, what is the standard deviation of the number of people who suffer from insomnia?
General
4 months ago
There is a clown's face on the top of a spinner. The tip of his hat rotates to (−2, 5) during one spin. What is the cosine value of this function?
General
4 months ago
My bus is scheduled to depart at noon. However, in reality, the departure time varies randomly, with expected departure times 12 o'clock noon and a standard deviation of 6 minutes. Assume the departure time is normally distributed. If I get to the bus stop 5 minutes past noon, what is the probability that the bus has not yet departed?
General
4 months ago
-50 Points-Find the probability that a randomly selected point within the circle falls in the white area.
General
4 months ago
Use the diagram to complete the statement.38Given AJKL, sin(38°) equalsO cos(38°).O cos(52°).O tan(38°).O tan(52°).
General
4 months ago
What is the slope of the line that passes through the points (-4,0) and (-4, -10)?Write your answer in simplest form.
General
4 months ago
An electronic device factory is studying the length of life of the electronic components they produce. The manager takes a random sample of 50 electronic components from the assembly line and records the length of life in the life test. From the sample he found the average length of life was 100,000 hours and that the standard deviation was 3,000 hours. He wants to find the confidence interval for the average length of life of the electronic components they produced. Based on the information, what advice would you give to him?Select one or more:a. The distribution of the length of life of the electronic components is usually right skewed. Thus, he should not compute the confidence interval.b. He did not take a simple random sample of the electronic components; thus he should not compute the confidence intervalc. The mean and standard deviation are large enough to compute the confidence interval.d. The population is right skewed, but the sample size is large enough to use a normal approximation. Thus he can compute the confidence interval.e. He can calculate the confidence interval but should use a t-distribution since it deals with an average.
General
4 months ago
Pittsburgh, Pennsylvania, and Buffalo, New York, lie approximately on the same meridian. Pittsburgh has a latitude of 40.5° N, and Buffalo has a latitude of 42.9° N. Find the distance between these two cities. (The radius of the earth is 3960 mi. Round your answer to the nearest mile.)
General
4 months ago
From a population of size 400, a random sample of 40 items is selected. The median of the sample Group of answer choices must be 200, since 400 divided by 2 is 200 must be 10, since 400 divided by 400 is 10 must be equal to the median of population, if the sample is truly random None of these alternatives is correct.
General
4 months ago
You will take either a basket-weaving course or a philosophy course, depending on what your advisor decides. You estimate that the probability of getting an A in basket weaving is 0.90, while in philosophy it is 0.60. However, the chances of your advisor choosing the basket-weaving course is only 20%, while there is an 80% chance that he will put you in the philosophy course. What is the probability that you end up with an A? (Enter your answer to three decimal places.)
General
4 months ago
The weights of bags of ready-to-eat salad are normally distributed with a mean of 300 grams and a standard deviation of 9 grams. What percent of the bags weigh less than 282 grams? 2.5% 5% 13.5% 34%
General
4 months ago
The area of a triangle is 10 square inches and its height is 5 inches. Find the base.2 in.04 in.25 in.
General
4 months ago
Use the normal distribution of SAT critical reading scores for which the mean is 513 and the standard deviation is 110. Assume the variable x is normally distributed. (a )What percent of the SAT verbal scores are less than 650? (b )If 1000 SAT verbal scores are randomly selected, about how many would you expect to be greater than 575? (a )Approximately nothing% of the SAT verbal scores are less than 650.
General
4 months ago
Carlon plans to evaporate a number of gallons of water from 90 gallons of a 15% salt solution to make a 25% salt solution. Which equation can he use to find x, the number of gallons that should be evaporated? Original (Gallons) Removed (Gallons) New (Gallons) Amount of Salt 13.5 0 Amount of Solution 90 x
General
4 months ago
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