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Question 935906: A laboratory technician needs to make a 135-liter batch of a 20% acid solution. How can the laboratory technician combine a batch of an acid solution that is pure acid with another that is 10% to get the desired concentration?
The laboratory technician can combine --L of the pure acid solution with --L of the 10% acid solution to get the desired concentration.
Click here to see answer by josmiceli(19441)  |
Question 935911: The coast-down time y for a car as it drops 10 mph from an initial speed x depends on several factors, such as average drag, tire pressure, and whether the transmission is in neutral. The table gives coast-down time in seconds for a car under standard conditions for selected speeds.
Initial speed Coast-down time Initial speeed Coast-down time
(in mph) (in seconds) (in mph) (in seconds)
30 30 50 17
35 26 55 15
40 22 60 14
45 19 65 13
Use a quadratic regression feature of a graphing calculator to find the quadratic function g that best fits the data
g(x)=__x^2-__x+__
(Round to four decimal places as needed)
Click here to see answer by TimothyLamb(4379)  |
Question 935938: The coast-down time y for a car as it drops 10 mph from an initial speed x depends on several factors, such as average drag, tire pressure, and whether the transmission is in neutral. The table gives coast-down time in seconds for a car under standard conditions for selected speeds.
Initial speed(in mph) 30, 35, 40, 45, 50, 55, 60, 65
Coast-down time(in seconds) 29, 26, 22, 19, 17, 15, 14, 13
Use a quadratic regression feature of a graphing calculator to find the quadratic function g that best fits the data
g(x)=__x^2-__x+__
(Round to four decimal places as needed.)
Click here to see answer by TimothyLamb(4379)  |
Question 935937: The coast-down time y for a car as it drops 10 mph from an initial speed x depends on several factors, such as average drag, tire pressure, and whether the transmission is in neutral. The table gives coast-down time in seconds for a car under standard conditions for selected speeds.
Initial speed(in mph) 30, 35, 40, 45, 50, 55, 60, 65
Coast-down time(in seconds) 29, 27, 24, 21, 19, 17, 16, 14
Use a quadratic regression feature of a graphing calculator to find the quadratic function g that best fits the data.
g(x)=__x^2-__x+__
(Round to four decimal places as needed.)
Click here to see answer by TimothyLamb(4379)  |
Question 936056: This is a question I want to understand. This is a question from geometry.
1. Explain the relationship between the net of an object and the surface area of the object?
I would appreciate your help toward me.
Thank you for our time and effort.
Click here to see answer by MathLover1(20849)  |
Question 936055: This is a question I want to understand. This is a question from geometry.
1. Explain the relationship between the net of an object and the surface area of the object?
I would appreciate your help toward me.
Thank you for our time and effort.
Click here to see answer by Alan3354(69443)  |
Question 936356: rachel, siriana, tanya and ursula each contributed to a lottery pool. rachel contributed $12, siriana $15, tanya $20 and ursula $8. one of their tickets was a winner, paying $1100. if the winnings were distributed in proportion to each person's contribution, what was siriana's share of the winnings
Click here to see answer by TimothyLamb(4379)  |
Question 936354: A touchdown is worth six points. In 2013, Joe Flacco score 19 touchdowns, in 2012 he scored 25 touchdowns, and in 2011 he scored 20 touchdowns. How many points did Joe Flacco score between 2011 and 2013. explain how you found your answer.
Click here to see answer by TimothyLamb(4379)  |
Question 936308: Mariah earns $6.50 per hour working up to four hours each day after school. Her weekly earnings are a function of the number of hours she works.
A) Assumimg Mariah can work at most five days a week, identify a reasonable domain and range for this situation.
B) Create a table of values that shows the relationship between the number of hours Mariah works and the amount she earns each week.
C) Write a linear function to represent Mariah's weekly earnings.
Click here to see answer by TimothyLamb(4379)  |
Question 936260: The amount of medicince in Elizabeth's blood is modeled by the function m(t) - -t2 + 10t,where t is the number of hours after she takes the medicine. How many hours after Elizabeth takes her medicine is the amount of medicine in her blood the highest ?
Click here to see answer by Fombitz(32388)  |
Question 936582: If I have an 88% in algebra (403 out of 455) and I want to raise it up to at least a 90%, what would I have to get on my final exam? (I don't even know if exams count for my quarter grades in middle school, if you could answer that too that would help a lot) Thanks for your help, I appreciate it.
Click here to see answer by josgarithmetic(39613) |
Question 937377: An architect drew the blueprint for a new office building. He used a scale in which 1 inch represents 7.5 feet. The floor of an office in the building will have actual dimensions of 20 feet by 20 feet. What will be the dimensions on the blueprint?
Click here to see answer by TimothyLamb(4379)  |
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