# 1)Find the sixth term of the geometric sequence for which a1=5 and r=3 A)1215 B)3645 C)9375 D)23 I chose A 2)Write an equation for the nth term of the geometric sequence -12,4,-4/3... A)aN=-12(1/3)n-1 B)aN=12(-1/3)n-1 C)aN=-12(-1/3)-n+1 D)aN=-12(-1/3)n-1 I chose C 3)Find

92,404 questions, page 688
1. ## Maths

There are 50 students in a class of which 40 are boys and the rest are girls the average weight of the class is 44kg and the averageweight of the girls us 40kg. find the average wieght of the boys

asked by priya on March 15, 2015
2. ## statistics

According to a college survey, 22% of all students work full time. Find the mean and standard deviation for the number of students who work full time in samples of size 16.

asked by Hannah on March 16, 2015
3. ## Calc

A spherical snowball is placed in the sun. The snowball melts so that it's surface area decreases at a rate of 2 cm2 /min. Find the rate at which the diameter decreases when the diameter is 8 cm.

asked by Jocelyn on October 24, 2014
4. ## math

A bacteria culture starts with 1,000 bacteria and doubles in size every 2 hours. Find an exponential model for the size of the culture as a function of time t in hours. f(t) = 1

asked by liz on October 9, 2010
5. ## Math/geometry

Two angles are complementary.the second angle has 6 more than three times the measure of degrees as the first one. Find the measure of each angle using an equation. Define your variables. I didn't get what the two variables should be... And how I'd write

asked by Sonja R on April 12, 2016
6. ## STATISTICS

A study has shown that among people without any preschool education, 32% were employed at age 19. If 100 people without preschool education are selected, find the probability that 40 or fewer are employed.

asked by Sonny on October 28, 2009
7. ## Probability

From a box containing 7 blue, 5 red, 3 green, and 9 yellow marbles, 2 are drawn one at a time without replacing the first marble before the second marble is drawn. Find the probability that one is blue and one is yellow.

asked by Amanda on May 2, 2012
8. ## mathematics

the lenght of a rectangle is twice its width.If the width is reduced by 1cm and the lenght is also reduced by 2cm,the area will be 15cm(square).Find the dimensions of the original rectangle.

asked by john on October 26, 2014
9. ## Maths

A sheet of paper measuring 30cm by 20cm . A strip of Wide 4cm cut from it all around. Find the área of the remaining sheet and also the área of the cut strip

asked by Anonymous on December 1, 2017
10. ## math, geometry

The bases of trapezoid ABCD are \overline{AB} and \overline{CD}. Let P be the intersection of diagonals \overline{AC} and \overline{BD}. If the areas of triangles ABP and CDP are 8 and 18, respectively, then find the area of trapezoid ABCD.

asked by Anonymous on April 27, 2014
11. ## math

a 6 foot red casts a shadow that is 7 feet long. the shadow of a nearby tree is 42 feet long. slove a proportion to find the height of the tree

asked by andy on January 18, 2017

A rectangular classroom seats 252 students. If the seats were rearranged with three more seats in each row, the classroom would have two fewer rows. Find the original number of seats in each row.

13. ## Math

Tonia deposited a total of $174.52 into her checking account. She also withdrew a total of$186.15. Use addition to find the net change in Tonia’s checking account.

asked by Caitlin on September 25, 2011
14. ## College Algebra

The equation for the total revenue earned by a company for selling widgets is p=4q. The equation for the total cost of the company for producing widgets if p=q+6. Find the break-even quantity.

asked by Sarah on November 21, 2013
15. ## Math

The bearing of point Y from a point X is 048°. If Y is 115km away from point X and the bearing of point Z from Y is 120° at a distance of 75km. Find the distance between X and Z, using a scale of 1cm to represent 20km

asked by Bau on June 18, 2018
16. ## algebra

A tugboat goes 180 miles upstream in 15 hours. The return trip downstream takes 10 hours. find the speed of the tugboat without a current and the speed of the current

asked by maggie on August 9, 2012
17. ## calculus

Find all points on the curve x^2y^2+xy=2 where the slope of tangent line is -1. This is what I got. x^2y^2+xy=2 x^2*2ydy/dx + 2x*y^2 + x*dy/dx + y =0 dy/dx(2yx^2+x)= -2xy^2-y dy/dx = (-2xy^2-y)/(x+2yx^2) how do I finish from here? I need to know where the

asked by Riley on April 2, 2009
18. ## Math

1) A dilation maps triangle HIJ onto triangle H'I'J. If HI= 7 cm, IJ= 7 cm, I’J’= 5.25 cm, and H’J= 9 cm, the find HJ. a. 4.08 cm^^^ b. 6.75 cm c. 9 cm d. 12 cm 2) if A' is the image of a(3, 4) after a dilation with scale factor 7 centered at the

asked by Valhalla on September 24, 2018
19. ## English

I have to find all the nouns and label them. Exploration is dangerous. It takes courage to sail to an unknown land. Exploration - idea Courage - idea Land - place

asked by Aveary on August 26, 2015
20. ## Statistics

A car rental agency currently has 41 cars available, 28 of which have a GPS navigation system. Two cars are selected at random from these 41 cars. Find the probability that both of these cars have GPS navigation systems

asked by Anonymous on March 22, 2013
21. ## english

Hi I have to write a paper on 2 opposing sides of tattoos. but everytime I show my teacher 2 sides I think of she keeps saying the paper is still one sided. Can someone please help me find 2 truly opposing arguements when it comes to tattoos thanks sooooo

asked by jenny on December 12, 2008
22. ## chemistry

Lithium iodide has a lattice energy of -7.3x10^2kj.mol and heat of hydration of -793kj.mol. Find the heat of solution for lithium iodide.

asked by Cassie on September 22, 2011
23. ## MATH_URGENT

The bases of trapezoid ABCD are \overline{AB} and \overline{CD}. Let P be the intersection of diagonals \overline{AC} and \overline{BD}. If the areas of triangles ABP and CDP are 8 and 18, respectively, then find the area of trapezoid ABCD.

asked by RhUaNg on April 27, 2014
24. ## GEOMETRY HELPPPPP MEEEE PLEASSEEEEE!!!

Find the lengths of the diagonals of this trapezoid. trapezoid on a graph with points (-a,0), (-b,c), (b,c), (a,0) negative a and b are on the left side (a is on bottom and b is on top) and positive a and b are on the right side (a is on bottom and b is on

asked by Anonymous on December 23, 2012
25. ## math

A bacteria culture starts with 1,000 bacteria and doubles in size every 2 hours. Find an exponential model for the size of the culture as a function of time t in hours.

asked by liz on October 7, 2010
26. ## Maths

A shopkeeper has false balance. It weighs 10% profit when buying goods and weighs 10% loss when selling goods. Find the profit and loss percent by weighing?

asked by Rabin on August 27, 2016
27. ## Law of Sines

In Triangle ABC, a=15cm, c=9cm, and angle C= 35 degrees. Find b and angle b. (Recall sin theta= sin (180 degrees-theta). I'm not sure how to approach this.

asked by Richard on September 6, 2014
28. ## physics

Two objects (52.0 and 20.0 kg) are connected by a massless string that passes over a massless, frictionless pulley. The pulley hangs from the ceiling. Find (a) the acceleration of the objects and (b) the tension in the string.

asked by brando on July 1, 2013
29. ## math

8712-2178=6543 6543-4356=2178 Can you find another set of numbers with the same pattern? Now add the results you got. ..and a similar pattern by subtracting the results.

asked by Jared on June 12, 2007
30. ## physics

An 85-kg jogger is heading due east at a speed of 2.0 m/s. A 55-kg jogger is heading 22° north of east at a speed of 2.7 m/s. Find the magnitude and direction of the sum of momenta of the two joggers.

asked by Anonymous on January 12, 2015
31. ## math

justify that15 is the sum of eachrow of a 3X3 magic square using the number 0-9. Find the sume of all the numbers. What is the of eachrow in a 4X4 magic square that uses the numbers 1-16.

asked by Mark on April 22, 2010
32. ## geometry

A segment 12" long is divided into two segments having lengths in the ratio of 2:3. Find the length of each segment. (Hint: Let 2x and 3x represent the length of the parts.) x = ? segment 1 = (2x) = ? inches segment 2 = (3x) = ? inches

asked by terri on March 9, 2011
33. ## Algebra II

The future value of $6000 invested for 5 years at rate r, compounded annually, is given by S=6000(1+r)^5. Find the rate r, as a percent that gives a future value of$8415.31. Round to the nearest whole percent.

asked by Shay on July 7, 2011
34. ## math

Lareina understands factors, but sometimes she has trouble finding all the factors of a number. What advice would you give to help her find all the factors of a number? Demonstrate by finding all the factors of 110. I NEED HELPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!

35. ## science

a sphere A of mass 3.0kg moving at 8.0m/s collides with another sphere B of mass 5.0kg moving in opposite direction to A at 4.0m/s.find the velocities of the spheres immadiately after the impact if e=0.30

asked by yusuph on August 11, 2018

"Mahpee was selling magazine subscriptions. He earned $5 plus$0.50 for each subscription he sold. If Mahpee earned $25, use the equation 25=5 + 0.50n to find the number of subscriptions n he sold." How do I figure this out?? asked by Rinoa on September 21, 2010 37. ## maths need help word problem A number is made up of two digits whose sum is 9. If this number is now divided into the number made up of the same digits but in reverse order the result is six-fifths. Find the number? Step plz asked by help on November 15, 2016 38. ## physics Two objects (53.0 and 16.0 kg) are connected by a massless string that passes over a massless, frictionless pulley. The pulley hangs from the ceiling. Find (a) the acceleration of the objects and (b) the tension in the string. asked by chidera on September 23, 2014 39. ## math Mercy must obtain an average mark of at least 85 to get an A grade in her mathematics examination,out of the four examinations she obtained 80,85 and 82 in the first three. Find the mark she must obtain on the fourth examination of to enable her get an A asked by Glory on June 11, 2016 40. ## geometry Find the number of degrees in the measure of one of the base angles of an isosceles triangle, if the measure of the vertex angle is 36 degrees less than the sum of the measures of the base angles. asked by lorie on January 14, 2011 41. ## algebra Find the number of degrees in the measure of one of the base angles of an isosceles triangle, if the measure of the vertex angle is 36 degrees less than the sum of the measures of the base angles. asked by mw on January 14, 2011 42. ## Math A certain triangle has a perimeter of 3080 mi. The shortest side measures 71 mi less than the middle​ side, and the longest side measures 373 mi more than the middle side. Find the lengths of the three sides. asked by Jess on September 6, 2018 43. ## Calculus As an ice cube melts its surface area in decreasing at a rate of 6 cm^2 / sec. Find the rate at which the length of each side is decreasing at the moment when each side has length 2 cm. asked by Daniel on December 11, 2015 44. ## Physics A light Ray is incident at an angle of 45 degrees on one side of a glass plate of index of refraction 1.6. Find the angle at which the ray emerges from the other side of the plate asked by Gela on August 4, 2015 45. ## math Ms. Handler walks to work at an average speed of 5 kilometers per hour. If she increases her speed to 6 kilometers per hour, she will save 10 minutes. Find the distance she walks. asked by Rob on October 12, 2015 46. ## Geometry Segment AD is perpendicular to the radius of circle (B) and the radius of circle (c). If radius BA=6in, segment AD=21in and radius CD=16in, find the length of BC to the nearest tenth of an inch. asked by Ben on May 10, 2016 47. ## math (a) Use a graph of f(x) = sqrt(2x^2+9x+5)−sqrt(2x^2+2x+1) to estimate the value of lim x→∞ f(x) to one decimal place. (b)Use a table of values of f(x) to estimate the limit to four decimal places. (c)Find the exact value of the limit. asked by Kayla on February 11, 2015 48. ## social studies How did the slave trade affect the eastern shore? Also where can I find information about the Slave Trade on Maryland's Eastern shore on its economics and culture? Help is Appreciated! Thankyou asked by Johnny on November 6, 2008 49. ## Algebra II The future value of$6000 invested for 5 years at rate r, compounded annually, is given by S=6000(1+r)^5. Find the rate r, as a percent that gives a future value of $8415.31. Round to the nearest whole percent. asked by Shay on July 7, 2011 50. ## Chemistry With the mass percent of Fe, oxalate ion, and water; find the mass percent of potassium ion in the complex iron salt difference. Fe= 11.37% H2O= 12.24% oxalate= 28.01% asked by Anonymous on November 13, 2012 51. ## math there are 7 identical spheres each colored on the inside with one color in more than 4 of them. When 2 spheres of the same color touch each other they both glow in color. Using as few comparisons as possible, find a single spehere that has the majority asked by juliann on March 11, 2012 52. ## physics Two objects (41.0 and 20.8 kg) are connected by a massless string that passes over a massless, frictionless pulley. The pulley hangs from the ceiling. Find the acceleration of the objects and the tension in the string. asked by Anonymous on October 7, 2011 53. ## math The radius of circle is given as 2.8 cm to 2 significant figure (a) If C is the circumference of the circle, determine the limits between which C/π lies. (b) By taking π be 3.14; find to 4 significant figures the line between which the circumference lies asked by John on February 9, 2015 54. ## Writing Where Can i find some short current event articles? http://www.nytimes.com http://www.latimes.com http://www.pe.com http://www.time.com That is, just about any newspaper or newsmagazine. =) asked by Bryan on February 26, 2007 55. ## Math A rectangle is 40 meters longer than its width if its length were increased by 10 meters and its width would be decreased by 5 meters its area would be increased by 190 square meters. Find the dimensions asked by Jeska on October 13, 2016 56. ## calculus A spherical snowball is placed in the sun. The snowball melts so that it's surface area decreases at a rate of 2 cm2 /min. Find the rate at which the diameter decreases when the diameter is 8 cm asked by Jocelyn on October 24, 2014 57. ## Math A multiple - choice quiz contains 5 questions with 4 choices for each answer. A student passes the quiz if they get at least an 80% on the quiz . If a student guesses on every question , find the probability that she passes the quiz . I have tried asked by Kaela on February 28, 2015 58. ## Math-helpppppp 1)when a certain polynomial is divided by x - 3, the quotient is x^2+2x-5 and the remainder is -3. what is the polynomial 2) Find each quotient and remainder. Assume the divisor is not equal to zero. a)(2x^2+29x-x^3-40)/(-3+x) b)(6+7x-11x^2-2x^3)/(x+9) asked by sarah on April 28, 2012 59. ## biology Im carrying out an investigation on respiration, comparing the different rates in maggot tissue and mung beans. i was wondering if you could help me to find out why maggot tissue and mung beans are efficent to use? asked by Kat on June 18, 2008 60. ## physics write down the uncertainty in the volume of the cylinder (3.36*10^-2) write down the minimum uncertainty with which the volume of the cylinder can be determined (1.79*10^-2) it says to compare these values and discuss briefly. I figured out how to find asked by Anna on February 15, 2009 61. ## physics a rock is thrown vertically down from a bridge with an initial velocity of 30m/s and strikes the water in 2.0sec. find the velocity with which the rock strikes and the height of the bridge. asked by roger on June 20, 2014 62. ## trig If sin theta = x and -pi/2 is less than or equal to theta less than or equal to pi/2, find sin 2theta and cos 2theta in terms of x. Is it alright if I recommend you to my classmates tommorow? YOu seem to know more than my professor! asked by Priya on May 1, 2008 63. ## algebra a tugboat goes 160 miles upstream in 20 hours. The return trip downstream takes 5 hours. Find the speed of the tugboat without a current and the speed of the current. asked by ashley on August 19, 2012 64. ## Math 142 (Pre-Cal) (Circles) A wheel spins through 29 revolutions per minute. Find the angular velocity and the linear velocity if the radius of the wheel is 1.8 feet. w=? (rad/min) v=? (feet/min) asked by Ray on March 31, 2016 65. ## algebra Use the discriminant to find out whether this quadratic polynomial can be factored. Factor the polynomial if it is not prime. This polnomial is prime, so I cannot factor it. I just need help with the discriminant part. Thaks in advance for your help. asked by Trina on September 3, 2010 66. ## Precalculus The graph of the parametric equations x=cos(t), y=sin(t) meets the graph of the parametric equations x=2+4cos(s), y=3+4sin(s), at two points. Find the slope of the line between these two points. asked by Phil on April 9, 2016 67. ## physics A cart of mass M1 = 4.00 kg and initial speed = 4.00 m/s collides head on with a second cart of mass M2 = 2.00 kg at rest. Assuming that the collision is elastic, find the speed of M2 after the collision. i keep getting 2.3 m/s what am i doing wrong? asked by courtney on March 7, 2008 68. ## chemistry There are exactly 60 seconds in a minute, there are exactly 60 minutes in an hour, there are exactly 24 hours in a mean solar day, and there are 365.24 solar days in a solar year. Find the number of seconds in a solar year. asked by Mely on September 3, 2010 69. ## stats 2. The average age of a child in kindergarten is 66 months. The standard deviation is 4 months. If a random child is selected, find the probability that the mean age is: a) Between 64 and 68 months b) Greater than 62 months asked by AMbe on August 4, 2012 70. ## Algebra- is my answer right The function g is defined by g(x)=3x^2+6. Find g(5y) Algebra - drwls, Friday, February 4, 2011 at 11:07am 3*(5y)^2 + 6 = __? Algebra - Janet, Friday, February 4, 2011 at 3:56pm I get 75y+6 asked by Janet on February 4, 2011 71. ## maths if a hollow sphere of internal and external diameter 4cm melted 8cm respectively melted into a cone of base diameter 8cm . find the height of cone asked by priya on March 8, 2016 72. ## Math--help help help 1)when a certain polynomial is divided by x - 3, the quotient is x^2+2x-5 and the remainder is -3. what is the polynomial 2) Find each quotient and remainder. Assume the divisor is not equal to zero. a)(2x^2+29x-x^3-40)/(-3+x) b)(6+7x-11x^2-2x^3)/(x+9) asked by sarah on April 28, 2012 73. ## algebra Diagonal brace. The width of a rectangular gate is 2 meters (m) larger than its height. The diagonal brace measures square root of 6. Find the width and height. asked by Simone on August 24, 2010 74. ## mathematics the area of a rectangle is 175 and the length is 1 and a half times bigger than the width. find the width L x W = Area L = 1.5W 1.5W x W = 175 or 1.5W^2 = 175 W^2 = =116.666 making W = 10.80... and L = 16.20... 10.80... x 16.20... = 175 asked by ayinde on September 12, 2006 75. ## physics Silicon is doped an acceptor of 10^18/cm^3. Find the electron and hole concentration, the electron and hole mobilities, and the resistivity of this silicon material at 300 K. Is this n-type or p-type? asked by Alex on April 10, 2011 76. ## Language Arts Quick question. Is Two Kinds by Amy Tan, fiction or nonfiction? This is not a question on a quiz or a quick check. I cannot find any sources online that tell me whether or not it is fiction or nonfiction. asked by ILTHSM_ on October 1, 2018 77. ## math Christie pilots her plane for 360 mi against a headwind in 33 hrs. The flight would take 22 hrs and 15 mins with a tailwind of the same speed. Find the headwind and the speed of the plane in still air. asked by JULIA on October 16, 2016 78. ## Physics Charge A, +1 μC, is positioned at the origin of a coordinate system as shown below. Charge B, −1 μC, is fixed at x = 3 m. (a) Find the electric field on the x axis at x = 6 cm. (b) At what point on the x axis is the electric field zero? asked by Alyssa on January 29, 2016 79. ## precalculus The question is...find the radian measure of the central angle of a circle of radius r that intercepts an arc of length s. Then it gives the radius r of 27 inches and an arc length s of 6 inches. How do I do that? asked by Megan on February 28, 2010 80. ## math-statistics If the probability of an authentic laying goose is 0.83, find the probability of getting a laying goose on or before the fourht trial. I think that answer is: (0.17)(0.17)(0.17)(0.83)=.00407 *the answer needs to be rounded to three significant digits* asked by Sherri on December 14, 2008 81. ## Statistics If there are 6 red disks numbered 1 through 6, and 4 yellow disks numbered 7 through 10, find the probability of selecting a yellow disk given that the number selected is less than or equal to 4 or greater than or equal to 8. asked by SHEYLAMIEL on October 16, 2016 82. ## Math The sum of John's age and twice of his son's age is 56. In 8 years time, the son's age will be half of john's age. Find there present ages. Right now I wrote down an equation x+2y=56 and not quite sure what to do next. asked by Jonathan on October 31, 2009 83. ## chemistry CH_4 (g) + H_2O (g) --> CO (g) + 3H_2 (g) How many moles of water vapor react to yield 144.84 moles of hydrogen? I am confused on how exactly how to find this yield of water vapor asked by alex on April 3, 2019 84. ## MAT 116 A tugboat goes 180 miles upstream in 10 hours. The return trip downstream takes 5 hours. Find the speed of the tugboat without a current and the speed of the current. asked by Samantha on November 11, 2012 85. ## physics Two objects (39.0 and 21.0 kg) are connected by a massless string that passes over a massless, frictionless pulley. The pulley hangs from the ceiling. Find (a) the acceleration of the objects and (b) the tension in the string. asked by Sally on October 3, 2012 86. ## Stiochiometry 15.8 grams of NH3 and excess O2 produces NO gas and H2O. 12.8 grams of NO gas was produced. Find the percent yield. Balanced Equation: 4 NH3 + 5 O2 -> 4 NO + 6 H2O asked by Mikey on May 15, 2011 87. ## Pre Calculus Let$\bold{w} = \begin{pmatrix} 2 \\ -1 \end{pmatrix}$. There exists a$2 \times 2$matrix$\bold{P}$such that $\text{proj}_{\bold{w}} \bold{v} = \bold{P} \bold{v}$ for all 2-dimensional vectors$\bold{v}$. Find$\bold{P}\$.

asked by Bob on September 20, 2017
88. ## Statistics

Suppose that 92% of all SFSU students own a cell phone. Find the probability that 7 out of 10 random selected SFSU students own a cell phone. explain how answer was arrived

asked by Mitch on February 24, 2011
89. ## Math

Your school's football team scored 49 points. Your team's scored 19 points more than the opponent's scores. Write and solve an equation to find the opponent's score

asked by Izamae on September 12, 2016
90. ## English

is "six inches of snow are predicted, I'd better find my boots" a run on, simple or compound sentence. I am pretty sure its not a compound because there is no coordinate conjunction but i am not sure if it is a simple or run on sentence

asked by Pencer on April 9, 2019
91. ## cocoa

Julian's shadow is 6 feet long. At the same time a 31 foot tall building casts a shadow that is 28 feet long. What proportion could be used to find Julian's height?

asked by Anonymous on May 14, 2012
92. ## math

the distance between two stations is 300km. two trains start simultaneously from these stations and move towards each other ,the speed of one them is 7k/hr more than the other . if the distance between them after 2hours of their start is 34km ,find the

asked by TUHITUHI on October 7, 2012
93. ## chemistry

There are exactly 60 seconds in a minute, there are exactly 60 minutes in an hour, there are exactly 24 hours in a mean solar day, and there are 365.24 solar days in a solar year. Find the number of seconds in a solar year.

asked by Mely on September 4, 2010
94. ## Z table

Suppose that the readings on the thermometers are normally distributed with a mean of 0∘ and a standard deviation of 1.00∘C. If 8% of the thermometers are rejected because they have readings that are too high, but all other thermometers are acceptable,

asked by Anonymous on September 25, 2015
95. ## Chemistry-pH

Question: v cm3 of a 0.2 M HX solution and v cm3 of 0.1 M KOH solution is mixed.pH of the final solution is 5.3 1)Find ka of HX 2)Find the moles of NaOH and HCl should be added respectively,for the pH of 1dm3 of the solution to increase and decrease by 1

asked by Shenaya on May 31, 2017
96. ## English

We are doing this group project where we have to teach the class our vocab words. My job for the project is to make big flashcards with pictures of the words on it. One of the words is vignette, and I have no idea what picture to use, the definition is

asked by Emily on February 10, 2010
97. ## Physics

Two large, parallel, conducting plates are 20 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 3.0 10-15 N acts on an electron placed anywhere between the two plates. (Neglect fringing.) a)

asked by Lex on April 27, 2013
98. ## Math

A very strong girl runs 200 miles east for several hours. After a brief rest she runs another 100 miles north. She stops for the night at a local bed and breakfast and the next morning walks 75 miles directly south-east. Find the magnitude and direction of

asked by Kevin on November 23, 2010
99. ## Chemistry

Draw Lewis dot structures, including appropriate resonance forms, and assign formal charges to each of those structures, for the molecule urea, with chemical formula NH2CONH2. You should find at least 3 such structures, some of which will have formal

asked by Emma on October 25, 2009
100. ## physics

a boy stands on a cliff overlooking a lake below. He throws a rock at an initial velocity of 8.0m/s,at an angle 25 degrees above the horizontal. The lake's surface is 4.5 m lower than the point the rock was released. Find the speed of the rock just before

asked by bec on November 7, 2011