02/08/22

Suppose that arrival times for an elevator in a large hotel are bell-shaped with a mean of 20 seconds and a standard deviation of 6 seconds.
 What percent of time will the elevator arrive between 2 seconds and 8 seconds?
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02/07/22

IQ scores have an approximately bell-shaped distribution with mean 100 and standard deviation 15. Use the Empirical Rule to answer the following questions.
What percentage of IQ scores are above 130?What percentage of IQ scores are below 115?What percentage of IQ scores are between 70 and 85?
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02/07/22

04.07 Coordinate Geometry Test Part Two
Triangle RST has vertices located at R (2, 3), S (4, 4), and T (5, 0).Part A: Find the length of each side of the triangle. Show your work. (4 points)Part B: Find the slope of each side of the... more
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02/07/22

Domain and range in notation form
What would the domain and range for the function f(x) = 1/x-4 in any notation form
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02/07/22

Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the height of a man with a z-score of 2.1071 (to 4 decimal places)
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02/07/22

What is the height of the stone face? (Detailed Question Below)
To measure a stone face carved on the side of a​ mountain, two sightings 650 feet from the base of the mountain are taken. If the angle of elevation to the bottom of the face is 36° and the angle... more
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02/07/22

A ​6-ft vertical post casts a 16​-in shadow at the same time a nearby cell phone tower casts a 122​-ft shadow. How tall is the cell phone​ tower?
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02/06/22

Statistics Questions
The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 119 and standard deviation of 16 .Someone qualifies as having Stage 2 high blood pressure if their... more
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02/06/22

Geometry Help!!!
Given A(6, -2) and B(-4, 8), find the length of segment AB. Enter only a number. Round your answer to the nearest hundredth, if necessary.
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02/05/22

You need 630 mL of a 50% alcohol solution. On hand, you have a 10% alcohol mixture. How much of the 10% alcohol mixture and pure alcohol will you need to obtain the desired solution?
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02/05/22

Maria needs to mix a 10% saline solution with a 60% saline solution to create 200 millileters of a 20% solution.
Maria needs to mix a 10% saline solution with a 60% saline solution to create 200 millileters of a 20% solution. How many millileters of each solution must Maria use?Answer: Maria must mix ________... more
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02/05/22

MY question is how can I find the X-intercept, and the Y-intercept of the equation: y - 6 = 4(x + 5)?
I solved what I could like this....y - 6 = 4(x+5) equals-6y = 4x + 20-6 -6 -6 y = -2/3x + 20/6Slope: -2/3Y-intercept: (0,20/6)X-intercept: ?I cannot remember how to find the... more
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02/05/22

Geometry Help!!
Suppose the diagonals of a quadrilateral bisect each other. Can you conclude that it is a rhombus, a rectangle, or a square?I think it's a Rhombus but i'm not too sure.
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02/05/22

IQ scores and distribution
Suppose that IQ scores have a bell-shaped distribution with a mean of 103 and a standard deviation of 14 . Using the empirical rule, what percentage of IQ scores are between 61 and 145?
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02/04/22

Julio observed that customer satisfaction ratings are normally distributed. If the 33rd percentile is 6.775, and the 65th percentile is 7.394 on a scale from 0-10 find the mean and standard deviation
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02/04/22

How large is the first tank? If ....
There are 10 tanks, A, B, ...J.Tank B has the same capacity as tank A.Tank C has 1/2 the capacity of tank B,Tank D has 1/3 the capacity of tank C.Tank E has 1/4 the capacity of tank D. etc....Tank... more
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02/04/22

SAT practice problems

1.) Graphene, which is used in the manufacture of integrated circuits, is so thin that a sheet weighing one ounce can cover up to 7 football fields. If a football field had an area of approximately... more
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02/04/22

Hanks winning margin in a board game was 860 points. The total points scored by Hank and his opponent was 1692 what was Hanks score?
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02/04/22

solve and create word problem for 2 divided by 1/3
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02/03/22

Find the 21st term of the sequence ={15,8,1,-6}
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02/03/22

Is the triangle a right triangle? Explain your reasoning. (use description to answer)
A (3, 5), B (-2, 6), and C (0, 16) are the vertices of a triangle.
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02/03/22

Find the slope of each segment. a. m __/AB b. m__/BC c. m__/AC (use description to answer)
A (3, 5), B (-2, 6) and C (0, 16) are the vertices of a triangle.
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02/03/22

Write the slope-intercept form of the equation of the line passing through (3, 2) and parallel to 2x - y = 5.
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02/03/22

Write the slope-intercept form of the equation of the line passing through (4, -1) and perpendicular to 3x + 12y = 5.
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02/03/22

What is the slope of a line perpendicular to l? (use description to answer)
The equation of line l is y = 3x + 2.
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