# Jeffrey

Popular questions and responses by Jeffrey
1. ## Trigonometry

A building is 50 feet high. At a distance away from the building, an observer notices that the angle of elevation to the top of the building is 41 degrees. How far is the observer from the base of the building?

2. ## stats

Among the contestants in a competition are 44 women and 26 men. if 5 winners are randomly selected, what is the probability that they are all men?

3. ## Economics

Determine whether each of the following would cause a shift in the aggregate demand curve, the aggregate supply curve, neither, or both. Which curve shifts, and in which direction? What happens to aggregate output and the price level in each case? a. The

4. ## math

Michael and mateo begin running around a circular track from the starting point at the same time. it takes Michael 48 seconds one lap around the track. it takes mateo 60 seconds to complete one lap around the track how many minutes does it take before the

5. ## Math

Repeat the following procedure for the four given numbers. Add 7 . Double the result. Subtract 4 . Divide by 2. Subtract the original selected number. The 1st number is 1 . The result is 5 . The 2nd number is 4 . The result is 5 . The 3rd number is 7 . The

6. ## Statistics

According to Internet security experts, approximately 90% of all e-mail messages are spam (unsolicited commercial e-mail), while the remaining 10% are legitimate. A system administrator wishes to see if the same percentages hold true for the e-mail traffic

7. ## history

Which accurately describes the actions of Hernán Cortés during the Age of Discovery? A Upon arriving in the Americas, Cortés conquered the Mayan Empire and gained control of present-day Panama. B Upon arriving in the Americas, Cortés conquered the Hopi

8. ## math geometry

The area of a rectangular wall of a barn is 80 square feet. The length is 12 feet longer than twice its width. Find the length and width of the barn.

9. ## Statistics

A city ballot includes a local initiative that would legalize gambling. The issue is hotly contested, and two groups decide to conduct polls to predict the outcome. The local newspaper finds that 53% of 1200 randomly selected voters plan to vote "yes,"

10. ## Statistics

A city ballot includes a local initiative that would legalize gambling. The issue is hotly contested, and two groups decide to conduct polls to predict the outcome. The local newspaper finds that 53% of 1200 randomly selected voters plan to vote "yes,"

11. ## Probability as a Fraction

In a bag there are 7 red tiles, 3 blue tiles, and 2 purple tiles. How many and what color tiles would you have to add to the bag so that the probability of picking red is 1/3?

12. ## Honors Geometry

I'm stuck on these 2 problems. My Geometry teacher won't help me. What is the inverse of the Isosceles Triangle Theorem (ITT)? What is the contrapositive of the Isosceles Triangle Theorem (ITT)?

13. ## Math

An automobile purchased for ​\$31,000 is worth ​\$2800 after 6 years. Assuming that the​ car's value depreciated steadily from year to​ year, what was it worth at the end of the third​ year?

14. ## Algebra

I am working on a review worksheet and there are 2 problems I can't remember how to do. Each question has 6 other questions, so helping me with these will remind me how to do the others! Thank you!! 1.2(x+5) = 1.6(2x+5) and Solve for y a(y+c) = b(y-c)

15. ## Statistics

In 1998 a San Diego Reproductive clinic reported 49 live births to 207 women under the age of 40 who had previously been unable to get pregnant. Using the 90% confidence interval calculated above, would it be misleading for the clinic to report a success

16. ## calculus

For the function r(x)=x3+6x2x2−36, find the following. a. the y - intercept b. the x - intercepts c. all horizontal asymptotes. y = d. all vertical asymptotes. x =

17. ## math x

8. The Chicago Public School system has about 680 schools. About 130 of the schools will be closed. If five schools are chosen at random find the probability that at least 3 of them will be closed.

18. ## calculus

A spherical balloon is being inflated so that its volume is increasing at the rate of 200 cm3/min. At what rate is the radius increasing when the radius is 15 cm.

19. ## Technology

Would the president of a technologies workers union be considered a stakeholder for a telecommunication company?

20. ## thesis statement

whats a good thesis statement on cooking

21. ## Math

Which shapes have more than one line of symmetry? Explain your thinking

22. ## Geometry

The volume of a rectangular prism is 960 cubic inches. If the dimensions of the base are doubled and the height remains the same to create a new prism, what will be the volume of the new rectangular prism in cubic inches?

23. ## Circles

2 circles have different radius touch at a point and at the point has 1 common tangent and another common tangent touching the circles at different points other than the first

24. ## Graphing

The line l1 passes through the points (3,-3) and (-5,2). The line is the graph of the equation Ax + By = C, where A, B, and C are integers with greatest common divisor 1, and A is positive. Find A + B+ C.

25. ## College physics

When a 0.15 kg baseball is hit, it approaches the bat with a speed of 20 m/s and undergoes an elastic collision. (a) What is the impulse delivered to the bat by the ball? (b) If the baseball is in contact with the bat for 1.3 ms, what is the average force

26. ## Math

If 2 1/3 feet of silver ribbon cost \$.21, how much will 9 feet cost

27. ## chemistry

Q: Calculate the unknown molar concentration of CH3NH2 in MeOH titrated against a known molar concentration of HCl ? Could you please answer this, there are lots of examples around calculation PH of two known's but not so much of unknown concentration.

28. ## math

A balloon rises at a rate of 3 meters per second from a point on the ground 30 meters from an observer. Find the rate of change of the angle of elevation (in radians per second or rad/sec) of the balloon from the observer when the balloon is 30 meters

29. ## math

A right circular cylinder is to be designed to hold 750 cm3 of processed milk, and to use a minimal amount of material in its construction. Find the dimensions for the container.

30. ## math

A cardboard box manufacturer wishes to make open boxes from rectangular pieces of cardboard with dimensions 40 cm by 60 cm by cutting equal squares from the four corners and turning up the sides. Find the length of the side of the cut-out square so that

31. ## physics

static friciton is greater than sliding friction prove

32. ## algebra

this tells me to rewrite the expression using the distributive property and then simplify plz help me and show me the work here are the questions. 15(f+1/3) 16(3b-0.25) (c-4)d

33. ## JJ

A 30.84 mL volume of 0.128 M NaOH is required to reach the phnolphthalein endpoint in the titration of a 5.441 g sample of vinegar. Calculate % acetic acid in the vinegar.

34. ## CHEMISTRY

Assuming the density of a 5% acetic acid solution is 1.0 g/mL,determine the volume of the acetic acid solution necessary toneutralize 25.0 mL of 0.10M NaOH.

35. ## Pre algebra

y/2 - 5y/6 + 1/3=1/2

36. ## CHEMISTRY

In some solid calcium carbonate samples, calcium bicarbonate, Ca(HCO3)2, is also present. Write a balanced euation for its reaction with hydrochloric acid.

37. ## algebra

I need help!!! 3/2,1/2, 1/6,1/8,... I need to determine if this sequence is arithmetic, geometric, or neither, then I need to find the ninth term

38. ## Mathematics

In a class of 100 students, 50 studied chemistry only, 30 studied Agric only, 40 studied biology only. 30 study biology and chemistry. How many study all 3 subjects?

2y-4=14

40. ## math

Find the radius and the diameter to the nearest hundredth when C = π yd. Use 3.14 for π.

41. ## ALGEBRA

A SPINNER WITH FOUR EQUAL SECTIONS NUMBERED 3,5,7 AND 8 IS SPUN TWICE. WHAT IS THE PRBABILITY THAT AN ODD NUMBER IS SPUN THE FIRST TIME AND AN EVEN NUMBER IS PUN THE SECOND? IS THE ANSWER 3/4? IS IT THAT EASY OR NOT?

42. ## physics

1. An electric pump, used to obtain water from 20 metres below the ground, is marked 5000W. a) If the pump operates as rated, how much energy is used to pump water every second? b) Describe the energy conversions that take place when the pump is used. c)

43. ## pre algebra

the ratio of boys to girls in an art class is 3.5. there are 12 boys in the class. how many girls are in the class?

44. ## 7 Mathematics

A team of 4 golfers scored 69,73,70, and 74 on the first round on a par 72 course. They reduced their team score by 3 on the second round. a) How many strokes above or below par was the team score on the first round? b) How many strokes about or below par

45. ## math

Given the following equation x,y data pairs find the least squares equation for these data. Use 3 decimal places. Y equals what + what x(3,3)(4,5)(6,8,)

46. ## math

given the following equations x,y data pairs find the least squares equation fo these data. use 3 decimal places. Y equals what + what x (3,3)(4,5)(6,8)

47. ## Physics

A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 245 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +2.7 m/s relative to the shore, and then hops onto an identical

48. ## CHEMISTRY

A 31.43 mL volume of 0.108 M NaOH is required to reach the phnolphthalein endpoint in the titration of a 4.441 g sample of vinegar. Calculate % acetic acid in the vinegar.

49. ## algebra

I need help!!! 3/2,1/2, 1/6,1/8,... I need to determine if this sequence is arithmetic, geometric, or neither, then I need to find the ninth term

50. ## Chemistry- Stochiometry

The conversion factor for deriving the number of moles of salicylic acid, C7H6O3, from a given number of grams of salicylic acid is...

51. ## chemistry

Could someone help me with this please? In chemistry, we did a lab in which he put brands of commerical vinegar in a microplate. We put in 10 drops of each vinegar in each plate thinger then we added 1 drop of phenolphthalein and then put in as many drops

52. ## Social Studies

Is there a desert in Italy? http://www.google.com/search?q=map+italy&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA Nope. =)

1. ## Math

LOL

posted on February 14, 2019
2. ## Math

excuse ,'teacher I did not do that one' teacher:ok why student: my grandma is in the hospital and my mom said you will do your homework later and I was in the hospital the whole day and had go to sleep after

posted on February 14, 2019
3. ## math

Well u better shut the heck up cause I don't care kid

posted on December 9, 2018
4. ## math

I agree

posted on December 9, 2018
5. ## MATH

Help everyone!!!!!!!!!!!!!!!!!!!!!!!!!!!

posted on December 6, 2018
6. ## MATH

Wtf I'm confused isn't it 40 on mine their is no 30

posted on December 6, 2018
7. ## geometry

sosos

posted on February 28, 2018
8. ## Physics

C,A,B

posted on January 4, 2018
9. ## social studies

Joy is right. I got a 100%

posted on October 6, 2017
10. ## Algebra 1

y=-10/x

posted on September 14, 2017
11. ## math

45

posted on February 24, 2017
12. ## chem 1

Molarity=number of moles(n)/volume also n=mass(m)/molar mass(M) therefore, Molarity(C)=mass/molar mass*volume C=58.44g/0.5L(58.44g/mol) C=2moles per litre

posted on January 23, 2017
13. ## life orientation

this it put or result people's life in danger because of insufficient of natural resource

posted on April 28, 2016
14. ## Sociology

The socialization process ends with the onset of puberty.

posted on March 6, 2016
15. ## Math estimation problem

It is 100 for estimation if yo are dividing.

posted on October 22, 2015
16. ## debate

resolved that capital punishment in the philippines in affirmative side

posted on October 12, 2015
17. ## Algebra

Got it! Thank you Steve!

posted on August 22, 2015
18. ## algebra

6P4 = 6!/(6-4)! =6*5*4*3*2*1/2! =6*5*4*3*2*1/2*1 =720/2 =360. (/)-represents division. (*)-represents multiplication. Thanks. I hope it was super helpful.

posted on April 24, 2015
19. ## Chemistry

posted on April 12, 2014
20. ## Statistics

Thank you, but I'm still confused. So is there not enough info to answer this question? Thank you for your time.

posted on October 28, 2013
21. ## calculus

The function is x^3+6x^2/x^2+36.

posted on May 29, 2013
22. ## science

dilute

posted on February 12, 2013
23. ## chemistry

thanks, sorry, 10ml of the unknown mixture was titrated methyl orange was used it took 7.5ml of 1M HCl (.0074Mol ?) so this means .00074Mol CH3NH2 / ml ?

posted on August 26, 2012
24. ## algebra

thank you

posted on August 25, 2010
25. ## Honors Geometry

Okay. I figured the problem out now. Thanks for your help!

posted on January 18, 2008
26. ## Honors Geometry

Okay, the ITT is If a triangle has two congruent sides, then the angles oppositeof those sides are congruent

posted on January 18, 2008
27. ## Honors Geometry

hmm.. okay, but i'm not really seeing how that goes with the ITT

posted on January 18, 2008