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A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known to possess a normal distribution with a mean of 450 seconds and a standard deviation of 50 seconds. Find the probability that a randomly selected boy in secondary school will take longer than 335 seconds to run the mile. A) 0.5107 B) 0.9893 C) 0.0107 D) 0.4893
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4 months ago
-2(4x+3)-(x-7)=46 solve please step by step
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4 months ago
Parallel lines e and f are cut by transversal b what is the value of x?
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4 months ago
help me solve these with work thanks!
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4 months ago
1.y=3xInput l -1 l 0 l 1 l 2 l 4 lOutput2.y=x²+1Input l -2 l -1 l 0 l 1 l 2 lOutputrepost*
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4 months ago
A feasible region is bounded by the constraints: 20 20 4 5 0.25 y x y x y x The objective function is P = 3x + 5y. (a) Graph the feasible region.(b) Find the value of the objective function at each vertex of the feasible region.(c) What is the minimum value of the objective function, P?(d) At which vertex point does the minimum value occur?Show all work. Answer: Math | Graded Assignment | Semester A Test, Part 2 © 2016 K12 Inc.All rights reserved. Page 2 of 3 Copying or distributing without K12’s written consent is prohibited. (Score for Question 3: ___ of 10 points) 2. In 2010, the population of a town was 8500. The population decreased by 4.5% each year.(a) Write an equation to find the population of the town t years after 2010.(b) In what year will the population of the town be 7000? Show your work. Answer:Math | Graded Assignment | Semester A Test, Part 2 © 2016 K12 Inc. All rights reserved. Page 3 of 3 Copying or distributing without K12’s written consent is prohibited. (Score for Question 2: ___ of 10 points)3. Consider the function 3 2 f x x x x 3 10 13 20 .(a) Determine the x-intercepts of f x .(b) Determine the y-intercept of f x .(c) Identify a point in between each of the x-intercepts of f x .(d) Determine the end behavior of f x .(e) Use the points and end behavior from parts (a) – (d) to graph f x . Label the scale of each axis. Answer:
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4 months ago
Tell whether each equation can be written in the y= mx + b. Write yes or no. If yes, write the equation in the form y= mx + b.3. y=8 - x² 4. y= 4 + x 5. y= 3 - 2x
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4 months ago
Which statement about the sum of two additive inverses is true? Select all that apply.A. The sum is 1.B. The sum is zero.C. The sum must be a positive number.D. The sum must be a negative number.E. The addends are the same number with opposite signs.F. The addends are the same number with the same signs.
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4 months ago
What is the product of (x2)3 and x4 ?
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4 months ago
marc bought a new video game for $50. After beating the game he sold.it for 45% less than the orginal price. How much did he sell the game for?
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4 months ago
Quadrilateral ABCD is a parallelogram. What is the measure of ∠DAB? Show your work.(ADC = 3x+17)(ABC = 5x-3)
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4 months ago
On Sunday Sheldon bought 3 and 1/2kg of plant food. He used 1 and 2/3kg on his strawberry plants and used 1/4kg for his tomato plantsHow many kilograms of plant food did Sheldon have Left
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4 months ago
Assume that a sample is used to estimate a population mean μμ. Find the 99.9% confidence interval for a sample of size 65 with a mean of 37.9 and a standard deviation of 15.4. Enter your answer as an open-interval (i.e., parentheses) accurate to one decimal place (because the sample statistics are reported accurate to one decimal place).99.9% C.I. =_____________.
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4 months ago
Based on a random sample of 25 units of product X, the average weight is 104 lbs. and the sample standard deviation is 10 lbs. We would like to decide if there is enough evidence to establish that the average weight for the population of product X is greater than 100 lbs. The population is normally distributed. What is the critical value (given in terms of the value of the test statistic) at a=.01? What is the calculated value of the test statistic? Form the hypotheses according to the question and perform the test at 1% significance level.
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4 months ago
A store is instructed by corporate headquarters to put a markup of 11% on all items. An item costing $27 is displayed by the store manager at a selling price of $3. As an employee, you notice that this selling price is incorrect. Find the correct selling price. What was the manager's likely error?
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4 months ago
How do I solve number five and what is the answer?
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4 months ago
A small combination lock on a suitcase has 5 wheels, each labeled with the 10 digits from 0 to 9. If an opening combination is a particular sequence of 5 digits with no repeats, what is the probability of a person guessing the right combination?
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4 months ago
Help please!! You’d have to find it algebraically!
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4 months ago
Two trains left the cities A and B at the same time and headed towards each other. The cities are s miles apart. The first train was traveling at the speed of v1 mph. The second train was traveling at the speed of v2 mph. After t hours the two trains met each other. Find the formula for t in terms of s,v1 and v2. Then find the value of t if:as=250, v1 = 60 , v2 = 40The formula for t is: (A) s · (v1 +v2) (B) s v1 +v2 (C) s v2 −v1 (D) v1 +v2 s (E) (v2 −v1) ·s
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4 months ago
In t hours the train has traveled s miles. Find the formula for v, the speed of the train (in mph) in terms of t and s. Find the value of v when:t=3, s=180
General
4 months ago
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