# Posts by Jake

Total # Posts: 2,323

1. ### Math

Is this correct? ((-6-2), 4-3) sqrt(8^2+1^2) sqrt(65) =8.062257748(2) =16.124?
2. ### Math

Rectangle side is represented by (2,3) and (-6,4). Find the perimeter of rectangle. Do I have to find the magnitude of (2,3) and (-6,4) and square root the answer?
3. ### Calculus

Thank you for answering. Don't I have to find the magnitude then use square root of the answer and multiply by 2? If so, could you show it.
4. ### Calculus

Rectangle side is represented by (2,3) and (-6,4). Find the perimeter of rectangle. Could someone please help~
5. ### Calculus and vectors

Could someone explain to me how I can find the area/perimeter/volume of a rectangular prism if I am given R^3 points. For example find area of rectangular prism given pts (2,3,4)(5,3,2), similar to this.

1.5
7. ### Calculus and vectors

Bob can swim at a rate of 5km/h. He is in a river that is flowing at a rate of 9 km/h. a) if bob swims upstream, what is his relative velocity to the ground? b)if bob swims downstream, what is his relative velocity to the ground? c) Someone decides to help Bob out of the water...
8. ### physics

Bob can swim at a rate of 5km/h. He is in a river that is flowing at a rate of 9 km/h. a) if bob swims upstream, what is his relative velocity to the ground? b)if bob swims downstream, what is his relative velocity to the ground? c) Someone decides to help Bob out of the water...
9. ### Math

Bob can swim at a rate of 5km/h. He is in a river that is flowing at a rate of 9 km/h. a) if bob swims upstream, what is his relative velocity to the ground? b)if bob swims downstream, what is his relative velocity to the ground? c) Someone decides to help Bob out of the water...
10. ### Chemistry

Why doesn't water undergo electrolysis? Why does Na2SO4 undergo electrolysis?
11. ### trig

verify that 2/1+cos theta - tan squared (theta/2) = 1
12. ### Math

Multiplying a vector by a scalar results in: a) a scalar b) a perpendicular vector c) a collinear vector c) a parallel scalar
13. ### Math

Sabrina and John cut a pie into 4 slices. Sabrina eats 2 slices. John eats the rest. What fraction names the part of the pie that John eats?
14. ### Biology

Among humans, increased interest in food intake normally occurs _____. only after the production of glucose in the liver can no longer meet metabolic needs when fewer calories are taken in than are expended, but only after the body depletes its reserves of fat in the liver via...
15. ### SCIENCE/ earth

Thanks Ms Sue!!!
16. ### SCIENCE/ earth

plate tectonics crossword puzzle what Qs and As can i use??????? PLZZZZZ HELP ME!!!!!!!!!!!!!
17. ### PHYSICS

A space explorer is 4.6 billion km away from a certain star, and observes that the gravitational force of attraction exerted on the spacecraft by the star is 500 N. What will the force become when the craft has approached to a position 2 billion km from the star?
18. ### PHYSICS

Determine the value for the acceleration due to gravity at the surface of the planet Mars, given the following data: Mass of Mars = 6 .42 x 10^23 kg Radius of Mars = 3.37 x 10^6 m Thanks!
19. ### chemistri

so are dispersion forces one of them?
20. ### chemistri

what are van der waals forces
21. ### work hours

If i am making \$11.50 an hour, 4 hours a day from monday through friday, how much do i get by the end of the month?
22. ### Calculus

I keep getting the wrong answer :| I don't know what I have done wrong...
23. ### Calculus

Could someone help me setup an equation for this equation? --------------------------------- A city bus system carries 4000 passengers a day throughout a large city. The cost to ride the bus is \$1.50/person. The owner realizes that 100 fewer people would ride the bus for each...
24. ### physical science

6. If one body is positively charged and another body is negatively charged, free electrons tend to [A. move from the negatively charged body to the positively charged body.] B. remain in the positively charged body. C. remain in the negatively charged body. D. move from the ...
25. ### INTRODUCTION TO THE SHORT STORY, PART 1

d is correct answer just took the pf test
26. ### Engish

I need to find the statment of life in the call of the wild by jack london
27. ### Calculus

The fuel efficiency, E, in litres per 100 km, for a car driven at speed v, in km/h is E(v)=1600v/(v^2+6400). a) Determine the legal speed speed that will maximize the fuel efficiency if the speed limit is 50 km/h. The answer is 50 km/h but my teacher said it can't be that...
28. ### Calculus

An object moves in a straight line. Its velocity, in m/s, at time t is v(t)=4t^2/(1+t^2),t≥0. Determine the maximum and minimum velocities on the interval 1≤x≤4.
29. ### Math

The concentration C(t), in milligrams per cubic centimetre, of a certain medicine in a patient's bloodstream is given by C(t)= (0.1t)/(t+3)^2 where t is number of hours after the medicine is taken. Determine the maximum and minimum concentrations between the first and ...
30. ### Calculus

An object moves in a straight line. Its velocity, in m/s, at time t is v(t)=4t^2/(1+t^2),t≥0. Determine the maximum and minimum velocities on the interval 1≤x≤4. The answer says min. velocity is 0m/s but has no maximum?

55
32. ### Calculus

Can someone explain this question to me? What intervals should I use to test whether or not the graph is concave up or down. I know that no points or equations are given so we have to estimate. Here is the URL for the graph. imgur dotcom/FdQCV
33. ### Calculus

Let f(x)=(2x^3-x^2+2x+1)/(x^2+1). What is the equation of the oblique asymptote of f(x)? Can someone show me how to do the long division one for this question. I have always used synthetic division but realized there are some questions that require to do long division.
34. ### Calculus

Let f(x)=x^2-8x+16 and g(x) x^2-16. For what values of x is f(x)/g(x) increasing? Explain plz~

36. ### Physics 161

A cat dozes on a stationary merry-go-round, at a radius of 6.9 m from the center of the ride. The operator turns on the ride and brings it up to its proper turning rate of one complete rotation every 7.3 s. What is the least coefficient of static friction between the cat and ...
37. ### Calculus

Let f(x)= (3x^2-2x+1)/(x-1). What are the types of asymptotes of f(x)? What are the equations of all the asymptotes of f(x)? The types of asymptote are vertical and oblique? x=1? Is there something wrong I did
38. ### Calculus

Determine the points at which f'(x)=0 for each of the following functions: f(x)= x^3+6x^2+1 f'(x)=3x^2+12x What to do next?
39. ### Calculus

The fuel efficiency, E, in litres per 100 km, for a car driven at speed v, in km/h is E(v)=1600v/(v^2+6400) a) determine the legal speed that will maximize the fuel efficiency using speed limit of 50 km/h
40. ### Calculus

An object moves in a straight line. Its velocity, in m/s, at time t is v(t)=4t^2/(4+t^3), t>(greater or equal)0. Determine the maximum and minimum velocities over time interval 1<t<4 I got minimum as 1= 4/5. However for maximum at t=4, I got 16/17 but the book says 4/3?
41. ### Calculus

An object moves in a straight line. Its velocity, in m/s, at time t is v(t)=4t^2/(4+t^3), t>(greater or equal)0. Determine the maximum and minimum velocities over time interval 1<t<4 I got minimum as 1= 4/5. However for maximum at t=4, I got 16/17 but the book says 4/3?
42. ### Calculus

For which point(s) on the graph of f(x)=5x/(x+2) is the slope of the tangent 2/5? a) (-3,15) b) (7, 35/9) c) (3,3) and (-7,7) d) (24, 60/13) Answer is C?

Thanks!
44. ### Calculus

Verify if correct or not please =) What is the slope of the normal to y= (x^2-1)/(x+5) at (1,0) a) -3 b) -1/2 c) -1/3 d) 1/3 Answer is A, -3. ---------------------------------------- What is the y-intercept of the line that is tangent to f(x)=4/(3x+1) at (-1, -2)? a)-5 b) -3/4...
45. ### Math

if h(t) = 17.4 * 1.23^1, find h(13)

1. 7 over 8
47. ### Ground School: Regulations

I am working on my private pilot license and these regulation things, HOW do you learn all of them?????????
48. ### Piloting: stumped

We are taking the class together and have questions about it. we aren't the same person!!
49. ### math

If you flip 2 coins then 25% chance
50. ### math

4 out of 5 that the number will be less than 900
51. ### Math

if f is an exponential function, and f(5)=20 and f(9) = 14, use the add-multiply property to calculate f(13),f(17), and f(21). Show your method

3/7
53. ### chemistryyyy

A solution is made by dissolving 0.0100 mol of HF in enough water to make 1.00 L of solution. At 23 °C, the osmotic pressure of the solution is 0.308 atm. What is the percent ionization of this acid? Please help.
54. ### Calculus-derivatives

Verify these answers~ 1. For what value(s) of x does f(x)=(x^2-16)^5 have a horizontal tangent? a) x=-4,4 b) x=-4,0,4 c) x=0 d) x=0,4 Answer is B, x=-4,0,4 --------------------------------------- 2. What is the derivative of f(x)=(3x^2+7)^3? a) f'(x)=3(3x^2+7)^2 b) f'(...
55. ### Calculus-derivatives

What is the slope of the tangent of each curve at given point y=√(16x^3), (4,32) If I find the derivative of y=√(16x^3) Will it be 16/-x^3
56. ### Calculus-derivatives

So for number 1 the answer is t=1 -2+2t=0 2t=2 2/2=1

Oh crap nvm!
58. ### Calculus-derivatives

For number one we find the derivative of 3-2t+t^2 wouldn't that be t-2?
59. ### Calculus-derivatives

Explain how to do these questions~ 1. An object moves in a straight line with its position at time t seconds given by s(t) = 3-2t+t^2, where s is the measured in metres. At what time is the object not moving? 2. Determine the coordinates of the point(s) on the graph of y=3x- 1...
60. ### Math

a ship leaves sydney heads and travels 45 km due east. it then returns and travels 86 km due north. how far is it from its starting point? please guys step by step.. thank you in advance.

62. ### Calculus

What is the derivative of 6/x?
63. ### Calculus

For each function, find the derivtive f'(a) for given value of a f(x) = sqrt(x+1), a=0

Thank you~
65. ### Calculus

May I know where you got 5a + 5h - 2
66. ### Calculus

Find each function, find f(a+h) and f(a+h)-f(a) a) f(x)=5x-2
67. ### English

What are 25 facts about Mr. Frank after the annex
68. ### Calculus

Why is it important to determine continuity of the function?
69. ### Math

State the equation of the line passing through the points (7,-1) and (2,2) a) 5x+3y-16=0 b) -5x-3x-16=0 c) -3x - 5y - 16=0 d) 3x + 5y-16=0 ------------------------------------ Is letter D correct?
70. ### Chemistry

How do you find the ratio of moles of oxygen to moles of tin? What would be the Empirical formula of tin oxide from the result of ratio? From my calculations I got the moles as: Moles of oxygen = 1.761 x 10^-2 Moles of Tin = 8.944 x 10^-3 Thanks!
71. ### Calculus

Examine the continuity of the function h(x)=[-x, if x<0 .......0, if x=0 .......x, if x>0 I don't understand this question...

Thank you~~
73. ### Calculus

Determine the equation of the line described by the given information. a) slope -2/3, passing through (0,6) b) passing through points (2,7) and (6,11) c) parallel to y=4x-6 passing through point (2,6)
74. ### Calculus

Determine an expression, in simplified form, for the slope of the secant PQ. Given: P(1,3) , Q(1+h, f(1+h)) , where f(x) = 3x^2 PQ=Y2-Y1/X2-X1 I keep getting wrong answer, arghhh.
75. ### Calculus

How to rationalize this question? (√3 - √2)/(√3+√2) Do I multiply those two by(√3 - √2) or (√3 + √2)
76. ### algebra

How do you write someone is older than 27 by less than 38 as an inequality?
77. ### Physics

An elevator (mass 4175 kg) is to be designed so that the maximum acceleration is 0.0700g. What is the maximum force the motor should exert on the supporting cable?
78. ### Precalculus

How can i write this in log form 5^-2 = 0.04
79. ### Precalculus

Quad III and IV? May I know how you got 3.86132? and value for quad IV?
80. ### Precalculus

Solve for x, 0<x<2pi 3sin^2x - sinx -2=0 Its not factorable, do I use quadratic formula?
81. ### Precalculus

The answer says:16.0 or 74.0 degrees :|
82. ### Precalculus

When a projectile leaves a starting point at an angle of elevation of theta with a velocity v, the horizontal distance it travels is determined by: d=v^2/(32) sin2theta Where d is measured in feet and v in feet per second. An outfielder throws the ball at a speed of 75 miles ...

10m/s
84. ### Precalculus

Write 4log2+log6-log3 as a single logarithm. Explain with steps please!~~
85. ### Precalculus

If the base was 2 then it would be cuberoot 2^6?
86. ### Precalculus

Evaluate log(Base4) ^3sqrt64 (The ^3 is an exponent infront of sqrt 64) I keep getting wrong answer :|
87. ### Precalculus

Solve for x: 6^(x+3) - 6^x = 215. I got answer as 1, is it correct?
88. ### Precalculus

Thankk you! Took me long to figure it out!
89. ### Precalculus

Solve 5^(2-x) = 1/125 for x.
90. ### Math

How do I solve this if there is no equation to this 1. The population of the bacteria in a Petri dish increases by a factor of 10 every 10 hour. If there are initally 20 bacteria in the dish, how long will it take before the population increases to 60,000 to the nearest tenth ...
91. ### history

What is the term for the power to make final decisions?
92. ### government

What is the term for the power to make final decisions?
93. ### Math

Determine the exact value of cos 465 degrees a) √3 + √2/2 b) √2 + √3√2/4 c)√2 - √3√2/4 d)2+√2-√3√2/4
94. ### Math

Explain how to do this with steps please. 1. Simplify cos(x-y)+cos(x+y)/cosx I did some of these so far, don't know if it is correct. Formula: cosxcosy= cos(x+y)+cos(x-y)/2 cos(x-y)+cos(x+y)/cosx =cosxcosy/2cosx
95. ### Math

Explain how to do this with steps please. 1. Simplify cos(x-y)+cos(x+y)/cosx Formula: cosxcosy= cos(x+y)+cos(x-y)/2 cos(x-y)+cos(x+y)/cosx =cosxcosy/2cosx
96. ### Math

Justine measures the milk in two different cartons. One carton contains 1 liter and 665 milliliters of whole milk, and the other carton contains 1 liter and 183 milliliters of chocolate milk. How much more whole milk is there than chocolate milk?
97. ### Math

How come I am not suppose to get rid of the the denominator?
98. ### Math

How many solutions does the equation cosx + 1/2 = 1 have for 0<x<2pi cosx+1/2=1 cosx+1=2 cosx=2-1 cosx=1 therefore 1 solution? A) 1 b) 2 c) 3 d) 4
99. ### Math

Solve (sinx-1)(cosx -1/2) = 0 where 0≤x<2pi a) pi/3, pi/2, 5pi/3 b) pi/6, 5pi/6, pi c) pi/3, pi, 5pi/3 d) pi/6, pi/2, 5pi/6
100. ### Math

Thank you~ T.T my school is fast paced, I am trying to keep up...