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Posts by Jack

Total # Posts: 1,786

english
from the book there are no children here what does " William died a few months later when a friend, fooling around with a revolver he thought was unloaded, shot William in the back of the head. Lafeyette never learned what happened to the snake." this mean? an ...

Math
15,659,999

math
62/d when d=3.1?

Statistics
The median is a relatively resistant measure, while the mean isn't. Therefore the mean gets pulled further in the direction of a long tail. Since the mean is smaller than the median, we conclude that the distribution has a left-hand tail.

geometry
Three line segments have the following measures: AB=6, BC= 3, and AC=8. If A,B, and C are distinct points, what conclusions can you draw about points A,B, and C? Draw a diagram and explain your answer.

phsics
a car moving with an initial velocity of 60 m/s south has a constant acceleration of 10 m/s^2 north. After 12 seconds its velocity will be: A) 60 m/s south B)60 m/s north C) 40 m/s north D) 40 m/s south

physics
during a journey over which speed varies, the maximum attained speed in comparison to the average speed is always: A)one half of it B) greater than it C)less than it D) equal to it E) none of this

phsics
throughout a time interval, while the speed of a particle increases as it moves along the x-axis, its velocity and acceleration might be: a) positive and negative B) negative and negative c) negative and positive D) negative and zero E) positive and zero

Acc. Algebra 2
Solve for s пr(s+r) Solve for a S= a(1-r^n)/1-r

Acc Algebra 2
The numerator of a fraction is 6 less than its denominator, and the value of a fraction is 3/5. Is this right?? 6-x/6+x=3/5

Acc. Algebra 2
One angle of a quadrilateral has a measure a°. Find the average of a measures of the other three angles.

Acc Algebra 2
Ohhh ok!! Thank you very much!!!

Acc Algebra 2
Why r we subtracting???

Acc Algebra 2
The length, width, and height of a rectangular box are consecutive integers, and the largest dimension is k cm. find the volume V of the box (Hint: V= lwh)

physics
this is what you got: 70 at W10°N takes them (-98.48,+17.36) but on a coordinate grid system, wouldn't 10 degrees N of W mean 170 degrees? so shouldn't the second part be <70 cos 170, 70 sin 170> the first part is the same, but the second part is different, ...

physics
An army tank division leaves base and travels 30 miles at 30° S of W and then turns and travels 70 miles at 10° N of W. What is their total displacement from base at the end of the trip? the answer i got is 94.96, what did you get?

physics
yea i was thinking that too,

physics
A spy stands on the sidewalk by an apartment building examining a foreign embassy across the street. The spy then climbs 30 m to the top the building and then slides 40 m along a wire at a 20° angle below right to reach a window on the embassy. What is their total ...

Lang ARts
okay thx

Lang ARts
hat fact best explains why it is significant that Angelou's narrative is set in 1940? In 1940, the United States was not yet involved in World War II. In 1940, segregation of blacks and whites was still the norm. In 1940, most high school students did not go on to college...

Math! Please Check My Answers
thx

Math! Please Check My Answers
:\

Math! Please Check My Answers
*sigh*

Math! Please Check My Answers
Anybody there?

Math! Please Check My Answers
Please Help!

Math! Please Check My Answers
Key: ☺ = My Answer! 2. Write a word phrase for the algebraic expression. 3x - 7 A. The difference of three times a number x and seven. B. The difference of seven and three times a number x. C. Three times a number x fewer than seven. ☺ D. The quotient of three ...

College Algebra
Solve system by method of elimination 0.07x + 0.02y =-0.07 0.08x - 0.06y = 0.07

College Algebra
Find the equation of the parabola y = ax2 + bx + c that passes through the points. To verify your result, use a graphing utility to plot the points and graph the parabola. (−2, −15), (−1, −4), (1/2,-10) y=?

chemistry
Combustion of 1 mol of octane results in the formation of 8 mol of carbon dioxide (CO2) . The molar mass of octane is 114.22 g/mol, and the molar mass of carbon dioxide is 44.01 g/mol. If an engine burns 550.0 g octane as it runs, what mass of carbon dioxide is released into ...

chemistry
Combustion of 1 mol of octane results in the formation of 8 mol of carbon dioxide (CO2) . The molar mass of octane is 114.22 g/mol, and the molar mass of carbon dioxide is 44.01 g/mol. If an engine burns 550.0 g octane as it runs, what mass of carbon dioxide is released into ...

College Algebra
Find an equation that has the given solutions. (There are many correct answers.) -1/6, -8/9

College Algebra
Find all solutions of the equation. Check your solutions in the original equation. (Enter your answers from smallest to largest. Enter NONE in any unused answer blanks.) 16t^2/3 + 40t^1/3 + 25 = 0

math
A. 12+x+8=2x 20+x=2x (subtract "x" from both sides) x=20 B. x+2+15=2+2x (subtract "2" from both sides) x+15=2x (subtract "x" from both sides) x=15 (Krista's age) 15+2=17 (Barrie's age now) 17+6=23

College Algebra (Urgent)
The demand equation for a product is p = 60 – 0.0004x, where p is the price per unit and x is the number of units sold. The total revenue for selling x units is shown below. Revenue = xp = x(40 – 0.0004x) How many units must be sold to produce a revenue of $260,000...

College Algebra
Use the position equation given below, where s represents the height of the object (in feet), v0 represents the initial velocity of the object (in feet per second), s0 represents the initial height of the object (in feet), and t represents the time (in seconds), as the model ...

College Algebra
A rancher has 100 meters of fencing to enclose two adjacent rectangular corrals (see figure). The rancher wants the enclosed area to be 374 square meters. What dimensions should the rancher use to obtain this area? (Round your answers to 2 decimal places. Enter the smaller ...

College Algebra
A pharmaceutical salesperson receives a monthly salary of $2480 plus a commission of 7% of sales. Write a linear equation for the salesperson's monthly wage W in terms of sales S. W(S) =

Algebra
An executive flew in the corporate jet to a meeting in a city 1700 kilometers away. After traveling the same amount of time on the return flight, the pilot mentioned that they still had 300 kilometers to go. The air speed of the plane was 600 kilometers per hour. How fast was ...

chemistry
Using the equipment below, explain how to prepare a .00052 HCL solution farom a regent bottle containing .13 HCL using only the equipment below. Note, you may make multiple solutions but you are not allowed to combine columes. for example, if you need 2 mLs of a solution, you ...

maths
what's the value of A if cot^A(1 - 3 sec A + 2 sec^2 A)=1 and A>90 degrees.

urgent physics..
Adventurous Mary tries a new game: she puts on her rollerblades and throws the ball towards the wall, lets it bounce off, catches it again, throws it right back, and so on. She notices a strange thing: after the second throw, she is unable to catch the ball anymore since the ...

urgent...maths
Find the sum of all primes p, such that p divides u(p), where u(p) is the p-th Fibonacci number. this iss very urgentt...

math
Find the sum of all primes p, such that p divides up, where up is the p- th Fibonacci number. please tell me the answer it's urgent about this..///

math
thanks i have now understood the problem.............

math
what's the sum of infinite terms?

math
S=1+2(1/5)+3(1/5)^2+4(1/5)^3…. If S=a/b, where a and b are co prime positive integers, what is the value of a+b?

math
If z=−√2/2+√2/2 i, what is the value of −(z^−52)? i is the imaginary unit where i^2=-1

math
A 999-digit number starts with 9. Every 2 consecutive digits is divisible by 17 or 23. There are 2 possibilities for the last 3 digits. What is the sum of these 2 possibilities?

math
Let α and β be the roots of 3x2+4x+9=0. Then (1+α)(1+β) can be expressed in the form ab, where a and b are coprime positive integers. Find a+b.

physics
Adventurous Mary tries a new game: she puts on her rollerblades and throws the ball towards the wall, lets it bounce off, catches it again, throws it right back, and so on. She notices a strange thing: after the second throw, she is unable to catch the ball anymore since the ...

physics
In a synchrotron, electrons are accelerated to speeds close to the speed of light v≈c≈3×108 m/s Suppose that in a synchrotron, 100 billion (1011) electrons move in a circular orbit of circumference L=300 m . Determine the electric current in Amps due the flow...

physics
apply formula v=u-gt v=0 u=14 g=10 then t=1.4s

physics
Potential = electric field intensity * distance 1.44=a*10 a=0.144

math
Find the sum of all primes p, such that p divides up, where up is the p-th Fibonacci number.

math
The real numbers x and y satisfy the nonlinear system of equations {2x^2 − 6xy + 2y^2+ 43x + 43y = 174 x^2 + y^2 + 5x + 5y = 30. Find the largest possible value of |xy|.

math
What is the sum of all possible positive integer values of n, such that n^2+19n+130 is a perfect square?

math
S=1+2(1/5)+3(1/5)^2+4(1/5)^3…. If S=a/b, where a and b are coprime positive integers, what is the value of a+b?

math
Let S(N) denote the digit sum of the integer N. As N ranges over all 3-digit positive numbers, what value of N would give the minimum of M=NS(N)?

math
Find the sum of the squares of the three solutions of the equation x^3+3x^2−7x+1=0.

math
Consider the function defined as f(x)=(x^2+2x+3)^2+4. As x ranges over all real values, what is the minimum value of f(x)?

math
ABCD is a square. Γ1 is a circle that circumscribes ABCD (i.e. Γ1 passes through points A,B,C and D). Γ2 is a circle that is inscribed in ABCD (i.e. Γ2 is tangential to sides AB,BC,CD and DA). If the area of Γ1 is 100, what is the area of Γ2?

math
In an urn, there are several colored balls, with equal numbers of each color. We add 14 balls which are all of the same new color, that is different from those in the urn. It is calculated that the probability of drawing , without replacement, two balls of the same color is ...

math
Let S={1,2,3,4,…,2013} and let n be the smallest positive integer such that the product of any n distinct elements in S is divisible by 2013. What are the last 3 digits of n?

math
Find the minimum possible value of 2cos4θ+8cos3θ+32cos2θ+56cosθ+100

math
If ABC is a triangle with AB=20,BC=22 and CA=24. Let D lie on BC such that AD is the angle bisector of ∠BAC. What is AD^2?

math
ABCD is a square. Γ1 is a circle that circumscribes ABCD (i.e. Γ1 passes through points A,B,C and D). Γ2 is a circle that is inscribed in ABCD (i.e. Γ2 is tangential to sides AB,BC,CD and DA). If the area of Γ1 is 100, what is the area of Γ2?

math
Suppose A,B,C,D, and E are distinct positive integers such that A<B<C<D<E, their median is 10 and their mean is 15. Find the maximum possible value of D.

math
Suppose A,B,C,D and E are distinct positive integers such that A < B < C < D < E,their median is 10 and their mean is 15.Find the maximum possible value of D.

calculus
find equation of tangent line for x^(1/3) + y^(1/2)=2 at point (1,1)

calculus
estimate ln(e^2+0.1)-ln(e^2)

calculus
estimate ln(e^2+0.1)-ln(e^2)

calculus
estimate change in f using the linear approximation and compute both error and the % error f(x)= (3+x)^1/2 a=1 change in x=0.5

algebra
karas custom tees experienced fixed costs of $200 and variable costs of $5 a shirt. Write an equation that can determine the total expenses encountered by kara custom tees . let x be number of shirts, c be cost of producing x shirts

calculus
estimate change in f using the linear approximation and compute both error and the % error f(x)= (3+x)^1/2 a=1 change in x=0.5

Physics
11 c) please!!!

Physics
11 c) Is the net charge positive or negative?

Physics
Is this correct for 10 d)= P=1/3T * int(-L*w*(Imax)^2*sin(wt)*cos(wt), 0 , 3T) Thanks!!!

Physics
10 d) Positive or negative?

Physics
(t*s^2)/(2*(PI^2)*b*(b^2-a^2))

Physics
11 c) please!

Physics
and 10 d), please

Physics
f= 1/(2*pi*sqrt(L*C))?

Physics
10 b) please!

Physics
10 b) 10 d) and 11 c) please!!!!

Physics
robbo 10 b)

Physics
robbo, the same that 9 a)

Physics
Please 11 c) and 10!

Physics
I think a b is missing! t*s^2/(2*PI^2*b*(b^2-a^2) )

Physics
8 f) Result of e multiplied by 2*pi*b*d

Physics
Please OVNI, 11 c)

Physics
BG, do you have 10 c and d?

Physics
BG, 8 d) B= mu_0*(r^2-a^2)*s/(2*r*pi*(b^2-a^2))

Physics
5 e) v= m*g*R/(B^2*W^2)

Physics
Hi BG, can you put the results for 8 a, b,c?

Physics
Please, problem 8!!!

Physics
Phy, do you have problem 8?

algerbra
What is the median and the 1st or lower quartile of the following data: 4, 12, 15, 20, 24, 30, 32, 35

Algebra
The class average on a math test was 82 and there are 8 students in the class. If seven of the scores are 80, 90, 78, 100, 76, 74, and 82, what must the 8th score be to produce the average of 82?

physics
What is the radius of an automobile tire that makes a complete turn in 0.1 sec and has a linear speed of 24.0 m/s?

Statistics
For the mean add them all up and divide by 6. For the median line them in order. Find the average of the middle two numbers

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