Posts by Sally
Total # Posts: 1,311

Calculus Related Rates
Two people leave from the same spot and walk at 4ft/sec going north and 5ft/sec going northwest. At 30 seconds, how fast is the distance between them changing? 
Calculus Related Rates
Mulch is dumped into a pile with height always 1/3 the diameter at a rate of 30 ft^3/hr. How fast is the height increasing when it is 6 ft tall? 
math
a private jet flies the same distance in 6 hours that a commercial jet flies in 4 hours.if the speed of the commercial jet was 143 mph less than 2 times the speed of the private jet, find the speed of each jet 
algebra
BASEBALL The equation h = –0.005x2 + x + 3 describes the path of a baseball hit into the outfield, where h is the height and x is the horizontal distance the ball travels. a. What is the equation of the axis of symmetry? b. What is the maximum height reached by the ... 
Adelphi
Which is a guideline for doctors pursuing research with human subjects? 
Math
it's b i promise! trust me. 
Physical Science
Which SI unit is used to measure length? A. meters B. newtons C. grams D. liters 
algebra
x^2 + x  12 What is the minimum value of y? 
algebra
Determine whether each expression is a polynomial. If it is a polynomial, find the degree and determine whether it is a monomial, binomial, or trinomial. 1. 7a^2b + 3b^2 – a^2b 2. 6g^2h^3k 
physics
In a thundercloud there may be an electric charge of 46 C near the top of the cloud and −46 C near the bottom of the cloud. If these charges are separated by about 6 km, what is the magnitude of the electric force between these two sets of charges? The value of the ... 
Calculus
Please help me find the limit: lim x> 2 ((1/3)1/sqrt(x))/)x9) 
math
what is a prime number? 
Math
2 is not D u big liars i got a 3/4 
Art PlZ HELP MEE!!!
Does anyone know the answers to the quiz? Mine are; D C A C C D B D D A Please tell me if I am right or wrong. 
maths
but the questions says twice. you have just calculated once. 
Algebra 1
A should be correct. 
Math???Plase Help
7/9 
Math
A group of 21 people have enough food for 24 days. If 15 additional people join them, they would have enough food for only___days. (Assume everyone eats the same amount of food each day) 
Math
During its first week of business, a market sold a total of 108 apples and oranges. The second week, five times the number of apples and three times the number of oranges were sold. A total of 452 apples and oranges were sold during the second week. Determine how many apples ... 
Algebra
gilbert plans to invest 9% and 11% annually. if he want to earn$1200 annually how much should he invest in each bond. 
Statistics
A machine fills 12 ounce bottles with soda. For the machine to function properly, the standard deviation of the sample must be less than or equal to 0.02 ounce. A sample of 8 bottles is selected, and the number of ounces of soda in each bottle is given. At alpha +0.05, can you... 
Algebra 1
no i think the answer is b 
Science...anyone?
Thanks, you saved my grade...um...the Answerer. P.S.: Are you a wiz kid? 
Science...anyone?
1. Which of these sources of energy is NOT renewable? a.) wind b.) solar power c.) hydroelectric power d.) natural gas 2. Air can be polluted by _____. a.) tiny particles of soot b.) carbon monoxide c.) sulfuric acid d.) all of the above 3. Which of the following can cause ... 
Finance
Homework Help: Finance Posted by Sally on Monday, November 23, 2015 at 8:02pm. The answer given by Finance  Anonymous , Monday, November 23, 2015 at 8:12pm Add the tax to the "before tax" to get the answer was not helpful. I am hoping someone can give me a guided ... 
Finance
Anonymous, I still don't understand. 
Finance
Jiminy's Cricket Farm issued a 30year, 7.2 percent semiannual bond 6 years ago. The bond currently sells for 87.5 percent of its face value. The book value of this debt issue is $103 million. In addition, the company has a second debt issue, a zero coupon bond with 9 ... 
Geometry
The coordinates of a triangle are X(0,0, Y(2h,2h), and Z(4h,0). Is the triangle a right triangle? Show work to support your answer. I don't really know how to solve this, or show m work. 
c++ programming
I need some help with my homework please Write a C++ program to prompts the user to enter the first character of shape name (Cycle, Rectangle, or Triangle). Then calculate the area of that shape. „h If the user enters another character the program should print: You should... 
math
x=$106 
math 6
Javier solves three math problems in five minutes. He has 20 math skillwork questions for homework, and he wants to complete them before talking with friends. How many minutes will javier take to complete 20 math skill work questions 
math
GEOMETRY The formula for the perimeter of a rectangle is P = 2 + 2w, where is the length and w is the width. A rectangle has a perimeter of 24 inches. Find its dimensions if its length is 3 inches greater than its width. 
help please english
my score was 12/12!!!! 
help please english
1.B 2.B 3.D 4.B 5.A 6.A 7.do yourself 8.B 9.D 10.D 11.A 12.C 13.A you're welcome p.s if i'm wrong, i'll post the ones i got wrong but for now these are my answers!!! 
math
Dracula, Frankenstein, Mummy, Gilda and Zelda are all having a Halloween party. Each of them has given an invitation to all of the others. How many invitations have been given out? 
Dallas can
2322 
physics
Power applied to a particle varies with time as P=(3t^22t+1)W. Find the change in kinetic energy between t=1s and 4s. 
math
8  (n) = 1 
science
is tap water a pure substance..? 
science
is a polyatomic considered a compound? 
Language Arts
BDA ARE THE ANSWERS 
math
Aren't we suppose to get rid of the 2 to get x.. by dividing on both sides? 
math
3x2y=8 5x2y=9 using elimination method.. please help. 
physics1
Vector A has a magnitude of 6 and is at an angle of 32.4 degrees measured counterclockwise from the x axis. Vector B has a magnitude of 12 and is at an angle of 113.8 degrees measured counterclockwise from the x axis. Vector C has a magnitude of 17 and is at an angle of 180... 
physics
Copy of Vector A has a magnitude of 5 and is at an angle of 29.7 degrees measured counterclockwise from the x axis. Vector B has a magnitude of 12 and is at an angle of 115.4 degrees measured counterclockwise from the x axis. Vector C has a magnitude of 18 and is at an angle... 
Calculus 3! ASAP please
Also, I do not understand how to add magnitudes. Please help. Let u and w be vectors in R3 such that u=3 and w=2 and the angle between the vectors is pi/2; what is the value of 3u4w?  answer is sqrt(145) 
Calculus 3! ASAP please
1.A given line is described by the system of equations x=2t+7; y=3t+4; z=5t; find the equation of a line parallel to the given line and which contains the point (1,1,0). 2.Let a=<0,6,2> and b=<0,2,4>, then the component of a parallel to b is given by?  the ... 
Algebra 2
Did I solve this complex rational expression correctly? (2/3)(x)/(2/3)+(x) 2/3x = 2/3x(3)/1(3)= (x)+(2/3) (2/3)+ (x)= 2/3 + x(3)/1(3)= (x)+(2/3) (x)+(2/3)/(x)+(2/3) = (3x2)/(3x2) 
algebra
Of Maria's total salary, 1/4th goes to taxes and 2/3rds of what remains goes to food, rent, and bills. If she is left with $500 each month, what is her total monthly salary? 
English
how do you write an evaluation for a narrative about Cry Freedom explaining techniques you have used in your narrative(eg. simile, metaphor, structure)??? 
Language Arts
boo is correct! 
science (cladogram)
james you're in my class @Mr. McAtee i'm telling mrs.christ about your cheating habits. 
Math Help
thanks damon 
Statistics
The average mark on an entrance exam was 70%, with a standard deviation of 9.6. In order to be accepted you must get 60% or better. If 800 students wrote the exam how many were accepted? 
periodic functions
At time 4 minutes your submarine is at its deepest, y= 1000m. At time 9 minutes you are at your shallowest, y= 200. Sketch the graph. Write the equation. Your sub is designed to cruise below y= 300 meters. At time zero was your submarine at its cruising depth? Between what ... 
math
Ava made 100 paper cranes, and Brittany made 3/4 of the number of paper cranes Ava made. Ava gave 9/20 of her paper cranes to Brittany. Then, Brittany gave 1/4 of her paper cranes to Ava. How many more paper cranes did Brittany have than Ava in the end? 
Language Arts
thanks to the people who helped but for the people who were cussing u people need to stop. just imagine u r at real public school, standing in front of a teacher, u would not cuss unless u were very stupid. oh and the answers are: 1D 2c 3a 4a 100% thanks all of u 
Math!!! Please help!!!
Find the coefficient of x^7 for (x3)^11 Use the binomial theorem to expand (2y3x)^5 Prove that (n over r)= (n over nr) for all integers where n is greater than or equal to r and r is greater than or equal to zero Prove that (n over n2) + ( n+1 over n1)= n^2 for all ... 
Mathematics
Find the coefficient of x^7 for (x3)^11 Use the binomial theorem to expand (2y3x)^5 Prove that (n over r)= (n over nr) for all integers where n is greater than or equal to r and r is greater than or equal to zero Prove that (n over n2) + ( n+1 over n1)= n^2 for all ... 
Trig
Find sin(s+t) and (st) if cos(s)= 1/5 and sin(t) = 3/5 and s and t are in quadrant 1. =Sin(s)cos(t) + Cos(s)Sin(t) =Sin(1/5)Cos(3/5) + Cos(1/5)Sin(3/5) = 0.389418 Sin(st) =sin(s)cos(t)  cos(s)sin(t) =sin(3/5)cos(1/5)  cos(1/5)sin(3/5) =Sin3/5 cos3/5 = 0.46602 HELP ... 
MATH
NOT INDEPENDENT A box contains four white, three red, and two black marbles. Three marbles are chosen at random. a. What is the probability that all three are the same color? b. What is the probability that all three are different colors? 
Math
Solve this system that is represented by the following matrix. [1 2 2 3 0 5 3 13 0 0 1 1] Write answer in (x, y, z) 
check my answers please
Does anyone have these answers to this assignment? 
chemistry cp
so it it letter c? 
chemistry cp
The term formula mass is a general term that can be applied to both ionic compounds and molecular compounds because (a) ionic compounds exist as individual molecules (b) molecular formulas are always empirical formulas (c) not all formulas represent individual molecules (d) ... 
business math
Anny invests $8,500, at 6% interest, compounded quarterly for 12 years? 
Math
Juanita invests $3,500, at 8% interest, compounded annually for 4 years? 
math
If Will gives Molly $9, he will have the same amount of money as her. If Molly gives Will $9, the ratio of the money she has to the money Will has will be 1 : 2. How much money does Will have in the beginning? 
Social Studies
I believe burned is the correct answer? 
Chemistry
What will happen to the number of moles of SO3 in equilibrium with SO2 and O2 in the following reaction in each of the following cases? 2 SO3(g) equilibrium reaction arrow 2 SO2(g) + O2(g) ΔH° = 197 kJ (a) Oxygen gas is removed. increase decrease stay the same (b) The... 
Science Help Please
What does "do" for number 18 mean 
Child Development
5+5=10 10+10=20 20+20=40 1+1=2 !!!!!!!!!!!!!!!!!:) :) :) :) :) :) :) :) :) :) :) :) :) !!!!!!!!!!!!!!!! 
6th Grade Geometry
are you sure that this is the answer?? I really need it 
math
60 degrees I think 
statistics
99 
math
Kim and Kent are on opposite sides of a canal, pulling a barge with tow ropes. Kim exerts a force of 50N at 20 degrees to the canal and Kent pulls at an angle of 15 degrees with just enough force so that the resultant force vector is directly along the canal. Find the number ... 
math
(1,1) and (13,3) (0,4) and (14,0) What are the coordinates for the intersection of the two lines? 
math
hakiim invested 15000 he put part of it in a term deposit that paid 4% per annum and the remainder in a treasury bill that paing 5% per annum after one year the total interest was 690 how much did hakiim invest at each rate 
Physics
sorry as in P1=666400 Pa not 666400pa*6 
Physics
Hi, just need a little help with this physics question please. A cylindrical tank of water is located 68m deep in water. An air lock at the bottome of the tank allows access. The sailor must wait while the air pressure in the lock is increased until it equals the water ... 
physics
The water storage tank has a diameter of 0.5m and contains 150L of water. You find a small hole rusted in the base, with a diameter of 10mm. what is the velocity of the water flowing out of the hole? So, i feel like I need to somehow use both Bernoullis equation and continuity... 
physics
The equation given is 2SO2(g)+O2(g)>2SO3(g), and if 224L/h of O2 (at standard temp and pressure) is consumed by the reaction, how much power is produced? I can't go further than P=Work/Time and Work=P times change in V I've tried 224x2224x3/60^2 but that's not... 
physics
Three charged marbles are glued to a nonconducting surface and are placed in the diagram as shown. The charges of each marble are q1 = 5.75 µC, q2 = 1.48 µC, and q3 = −2.47 µC. Marble q1 is a distance r1 = 3.00 cm to the left of the marble q2, while ... 
math/algebra
Determine three consecutive odd integers such that three times the middle integer is seven more than the sum of the first and third integers. 
science
idk what's the real answer 
math
Below are two pairs of points. A line goes through each pair of points. What are the coordinates for the intersection of the two lines? Show your work. Pair 1 (1,1) and (7,7) Pair 2 (0,8) and (8,0) 
Math
Thank you! 
Math
Mistyped it should say "10 spoke english & french" not "10 spoke english & frnech" 
Math
In a class of students, 80 spoke English, 110 spoke spanish, 100 spoke french, 50 spoke english & spanish, 30 spoke english & french, 20 spoke french & spanish, 10 spoke english & frnech, but no spanish. How many spoke spanish & french, but not english? The answer is 0. I was ... 
statistics
A professor gave an aptitude test to a class of psychology students and computed the mean, median, and mode for the test scores. Which of the following statements cannot be an accurate description of the scores? All of the above statements are false. The majority of the ... 
Physics
An object fired at an angle of 31.9° above the horizontal takes 2.55 s to travel the last 15.5 m of its vertical distance and the last 10.5 m of its horizontal distance. With what speed was the object launched? (Note: This problem does not stipulate that the initial and ... 
Physics
You are practicing throwing darts in your dorm. You stand 3.21 m from the wall on which the board hangs. The dart leaves your hand with a horizontal velocity at a point 1.94 m above the ground. The dart strikes the board at a point 1.73 m from the ground. a) Calculate the time... 
Physics
How much work is it to push a box (mass 120 kg) up an incline (angle 16 degrees with the horizontal) that is 9.6 meters long, if the coefficient of kinetic friction between the box and the incline is 0.5? 
english
b 
stats
A jar contains 7 black balls and 25 red balls. You take 2 out without replacing them. Find a)the probability of drawing 2 red balls in a row, b) the probability of drawing a red ball, then a black ball, c) the probability that the two balls will be of different colors 
P.E
LizLiz Is Correct! Yay! 100% For Me! 
Algebra ASAP thx
81 
math
12% 
chemistry
How much energy (in kilojoules) is needed to heat 4.00g of ice from 11.0∘C to 21.5∘C? The heat of fusion of water is 6.01kJ/mol, and the molar heat capacity is 36.6 J/(K⋅mol) for ice and 75.3 J/(K⋅mol) for liquid water. 
Physics/Calc
A ball is thrown vertically upward from a cliff with a speed of 20 ft/sec. The ball hits the ground at 140 ft/sec. How high is the cliff? v'+32