Thursday
July 24, 2014

Posts by Joe


Total # Posts: 2,048

Math
11/12 - 3/4 Help

english
what is a verb?

chemistry
A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 3.9cm . Its mass is 1.3kg . Calculate the density of the metal.

Math
Miss Sue made an error putting in the question,can you please help me again. You are also making a fruit salad. You have already selected apples, oranges, kiwi, strawberries, and blueberries which total $17.28, you still need to purchase bananas. The bananas cost $0.44 per pou...

math
You are also making a fruit salad. You have already selected apples, oranges, kiwi, strawberries, and blueberries which total $17.28, you still need to purchase bananas. The bananas cost $0.44 per pound. You choose three bunches that weigh 3/4lb, 11/3lb, and 15/8lb. Determine ...

chemistry
If 51J of heat is added to an aluminum can with a mass of 23.0g , what is its temperature change? Specific heat capacity of aluminum is 0.903 J/g∘C.

chemistry
If 51J of heat is added to an aluminum can with a mass of 23.0g , what is its temperature change? Specific heat capacity of aluminum is 0.903 J/g∘C.

physics
Find the area of a rectangle whose sides are 12.68 cm and 98.5 mm.

math
containers of sides are on sale. You can get 2 containers for $3.00 and 1 for $1.95. Determine the cost of three containers of sides.

chemistry
What is the density of a cube that has a mass of 134 g and the side of the cube measures 2.75

math
Members of the West High School Band were hard at work practicing for the annual Homecoming Parade. First, they tried marching in rows of 12, but himself to bring up the rear left Andrew. Then the director told the band members to march in columns of eight, but Andrew was stil...

marketing
Michael Soles--owner of Soles Shoe Store--recently discovered that shoe stores in his trading area have an average markup of 40%. Upon investigation, Michael found that his average markup is $15 on shoes that he sells for $45. This suggests that:

math
from a standard 52 card deck, how many 7 card hands have exactly 5 spades and 2 hearts?

math
From a standard 52 card deck, how many 5 card hands will have 2 clubs and 3 hearts?

Physics
IF YOU ADD THEM ALL UP AND DIVIDE BY 69 UR ANSWER IS STILL WRONG LOL

chem
The speed of your ship in still water is 20 knots.Your ship traveled 70 miles downward in channel in the same amount of time it traveled 45 miles upward the channel.Calculate the rate of the channel current.

Math
Define a variable, and write an equation. If x is the number of candy bars that Jason started with, x - (1/3)x - 3 = (11/30)x is an equation that can be solved to find the solution.

algebra
Difference of two squares: Example: x^2 - 9 factors to (x+3)(x-3) Perfect squares: x^2 + 6x + 9 = (x+3)(x+3) x^2 -6x + 9 = (x-3)(x-3) Cubes: x^3 - 27 factors to (x-3)(x^2 +3x +9) x^3 + 27 factors to (x+3)(x^2 -3x +9) Can you see the pattern?

Statistics
This is definitly an error because Ho was rejected when it was true. Google Type I and Type II errors and you will find the definition of each and then you will be able to figure out which error happened here.

Math
To find the range, substitute the values from the domain. Example: y = -3x + 4 y = -3(-3) + 4 = 9 + 4 = 13 y = -3(-2) + 4 = 6 + 4 = 10 So, we are finding the range of 13 and 10 s0 far

Statistics
You want to use a two-tailed t-test. You do not want to use matched pairs. books set things up differently, but here is one way to do it.. group 1 = dog owners group 2 = no dog Ho: mu1 - mu2 = 0 Ha: mu1 - mu2 does not = 0 If you are allowed to use a statistics calculator (like...

Trignometry
use the law of cosines to start and find side c. Then use the law of sines to find remaining angles.

physics
A 3 N weight slides down a ramp made of sandpaper. The coefficient of friction is 0.8, and the ramp is at an angle of 50° to the horizontal. How could you calculate the magnitude of the friction force? A. 3 N × sin(50°) B. 3 N × 0.8 × 50° C. 3 N &...

Calculus
a = 14, b = 21

Math 6th Grade Level
If he used 100 bags of the flour, this means he used 1/2 of the flour (100 is 1/2 of 200). So, 1/2 of 680000 is 340000 oz that were left. Therefore, he had 340000/5000 bags (you can do the math).

pre-cal
The 3-point line in basketball is 23 ft 9 in away from the point on the floor vertically below the center of an 18-in diameter rim. The rim is 10 ft above the floor. Kim shoots a three pointer using a 9-in diameter ball from the 3-point line that just clears the basket. The re...

math
-23/21

Math for Educators
The first ones are correct. Does it matter what base your solution is for the last one?

Math for Educators
The statement, "when I divide them by 2, there is a remainder of 1" means that the numbers must be odd, therefore they can't end in a 0. I'm only seeing 2 answers, 25 and 85

math
v(x) = 30000-1000x v(7) = 30000-1000(7) = $23000

Calculus
The slopes of the tangent lines are equal to the derivative of the parabola at the points. y ' = 2x, so y'(a) = 2a and y'(-a) = -2a. You can also use the slope formula m = (y2-y1)/(x2-x1) to find the slopes of the tangent lines. Therefore m = (a^2+3-(-6))/(a-0)=(a^...

Calculus
if p(2) = 6, substituting in the p(x) function, 6 = 4a + 2b + c p ' (x) = 2ax + b, therefore if p ' (2) = 2, this means that 2 = 4a + b p '' (x) = 2ax + b, therefore if p '' (2) = 3, this means that 3 = 2a and a = 3/2 substituting 3/2 for a in 2 = 4a + ...

Physics
Thanks!

Physics
A trapeze artist swings from one 35-ft long trapeze to another trapeze. She releases one trapeze at a 30 degree angle relative to the vertical. She flies through the air, catching the other trapeze 18 ft away at the same elevation. What was her release velocity?

Algebra
3x^2(2x^2 - 7x - 4) =3x^2(2x+1)(x-4)

rochester
A 3kg stone falls from rest a top a cliff, hitting the ground traveling 42m/s. How much force does it do on the ground below if that ground is compressed 0.30 meters? (w= F*d=KE-PE)

english
plz give me solutions of 10 class bbc compehensions answers

math
SOLVE FOR P, Q, &R p + 1/(Q+ 1/R)= 25

math
SOLVE FOR P, Q, &R

chemistry
explain why a balloon with 1.00 mol xe gas in it has the same volume as balloon with 1.00 mol he gas in it

physics
How long does it take light to travel through a 2.7 mm-thick piece of window glass?

algebra!!!! please help me!!!!
This is a Brilliant question. Please do not answer.

Algebra
Prove by mathematical induction that 3^(3n+1) + 2^(n+1) is divisible by 5

Geometry
Lines p and q are parallel and are intersected by transversal r. If angle 1 = 4x degress and angle 2 = 2x+24 degrees, what is the measure of angle 2?

American Government
Proportional representation systems like those in Western Europe encourage the formation of smaller parties by enabling parties to: A. win legislative seats even though they do not receive a majority of votes in elections. B. receive campaign funds from government in proportio...

chemistry
im so confused about this question Calculate the pH of a solution that has [H3O+] = 5.5 x 10-3.

math
mrs nelson has a rectangular flower box that is 5 feet long & 2 feet tall. she wants the width ofn the box to be no more than 5 feet. if the width is a whole number, what vare the possible volumes for the flower box?

algebra
A student traveled 206 km in 16 days. At the same ratio, how far would the student travel in 64 days?

Math
A gardener is installing a circular garden. The radius of the circle 28 feet. He needs to know the circumference in order to buy materials for the edging. What is the circumference if he uses = . The circumference is __ feet

Math
A lot is in the shape of a trapezoid. The sum of the bases is 180 feet. If the area of the lot is 8,100 square feet, what is the distance across the lot, i.e. the altitude of the figure? The altitude of the trapezoid is __ feet.

trignometry
If it helps the answer according to this ACT compass sample test questions print out is 6.93. How to solve it is the question ... C is a 90 degree angle. AB is 8 and the hypotenuse. AC is the base .... we don't know it's length. It's on page 14 if you google this -...

chemistry
platinum metal currently costs $1700 per troy ounce ( note: this is different than a regular ounce 1 troy ounce =31.1035 g. what would the costs be, in dollars , to purchase enough platinum to form a solid cone with maximum radius 0.750 m ?

chemistry
A sample of copper metal containing 7.738*10^24 atoms is drawn into a cylindrical wire with radius r = 0.625 mm . How long must the wire be in meters?

Math
Compute the number of vinyl tiles, measuring 25 cm each side, needed to tile a kitchen measuring 102 ft. by 18 ft.

Math
Write 70,633.29 two other ways.

Chemistry
What [PB2+] should be maintained in Pb(NO3) to produce solubility of 1.0*10^-4 mol PbI2/L when PbI2 (s) is added? Ksp for PbI2 is 7.1*10^-9 I can't figure it out...

Science-Chemistry
Methyl amine is a weak base with a pKb=3.35. Consider the titration of 30.0mL of .030M of Methyl amine with 0.025M HCl. a) Write the appropriate equation for the reaction. b) Calculate K for the reaction in part (a). c) Calculate pH of the initial methyl amine solution (0mL ad...

Physics
A singly charged positive ion has a mass of 2.74 10-26 kg. After being accelerated through a potential difference of 268 V, the ion enters a magnetic field of 0.450 T, in a direction perpendicular to the field. Calculate the radius of the ion's path in the field. cm

Math
Remy can chop 5 carrots in 3 minutes. How long will it take him to chop 120 carrots?

Algebra
simplify and write in standard form (2p^2-p)+(7p^4+P^3+2p)

Chemistry
What volume of H2(g), stored at 26°C at a pressure of 141 atm, would be needed to run an electric motor drawing a current of 8.4 A for 4.8 h?

math
Marty walks to school 4 days each week. The walk talks 15 minutes. How much time does it take marty to walk to school & home each week. Is this correct? 15×4=60 it takes him an hour each week

Physics
An object that is 32 cm in front of a convex mirror has an image located 17 cm behind the mirror. How far behind the mirror is the image located when the object is 24 cm in front of the mirror?

Physics
An object is placed in front of a convex mirror with radius of curvature = 17 cm. The object's height is 3.5 cm and it is initially 25 cm in front of the mirror. Find the (a) location and (b) height of the image. Next the object moves closer to the mirror, so the object di...

Math
Kurt cut pizzas into wedges measuring 40 degrees. If each person eats one piece of pizza How many people could he feed with 2 pizzas

General Chemistry II
Also, not sure if I did this correctly: Compute the solubility in moles/ liter for each sample titrated. 2.3 g KHTar in water. 2.3/18= .128 S= (.128/0.05)= 2.56 moles/ liter Is this correct?

General Chemistry II
Why is the Ksp value larger for NaNO3 and KNO3 than water?

SS Please check answers
your not helping at all

Mathematics
System 5x+8y+6z=14 2x+5y+z=12 -3x+6y-12z=20

Math
pie chart

chemistry
3.61*10^-9

geometry
In the diagram, circle A is tangent to circle C, and segment BE is tangent to circle A. The radius of circle A is 11 meters and the radius of circle C is 8 meters. Find the area of triangle ABE to the nearest square meter.

math
What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)-7/3 d)4

math
i got 8s-12t=-1 and 9s-12t=0 i don't get how you subtract this?

math
how do you subtract this?

math
What is the value of u in the following system of linear equations? 4u + 3v = –1 3u + 2v = 1 a) 5 b)-11/2 C)-7 d)19/3

math
Look at the revenue for videos rented (v) on a given day at two different video rental stores below r = 2v + 10 r = 1.6v + 18 After how many video rentals will the revenues of both stores be equal? a)25 b)45 c)70 d)20

Chemistry
Na2SO4 solution is slowly added to a solution which contains .10 M Ba (2+) and .1 M Pb(2+). which of the following statements descrives the result of the addition of Na2SO4

Math
the perimeter of a rectangular field is 140m. If the length is increased by 15m and breadth is decrease by 5m, the length will become 3 times the breadth. Find the length of breadth of the field.

math
the ages of a son and father are in the ratio 3:8. if the son is 35 years younger than his father. find their ages.

Chemistry
you're the best! thank you!!

Chemistry
The Ka of a monoprotic weak acid is 8.11 x 10 ^ -3. What is the percent ionization of a 0.125M solution of this acid?

Chemistry
Assuming complete dissociation, what is the pH of a 2.55 mg/L Ba(OH)2 solution?

Language Arts
Or C

Language Arts
Oh OK I was asking it for homework help and it was an abcd question. I'm thinking it might be D then

Language Arts
Help Ms. Sue! Please check if I'm correct on this question. * Which of the sentences below is the best option for a thesis statement? A.) An after-school program at the community center might involve classes, sports, and other activities in which children can take part. B....

Physics
A 50.0-kg box is resting on a horizontal floor. A force of 250 N directed at an angle of 20.7° below the horizontal is applied to the box. The coefficient of kinetic friction between the box and the surface is 0.300. What is the acceleration of the box?

Science (physics)
A particle P is launched from a point O with an initial velocity of 60m/s at an angle of 30 degrees to the horizontal. At the same time, a second particle Q is projected in the opposite direction with initial speed of 50m/s from a point level with point O and 100m from O. You ...

Algebra
3 real numbers that form a geometric progression have sum equal to 175 and product equal to 17576. What is the sum of the largest and smallest numbers?

Trigonometry
I think I did use the sine law but I am just not sure how to get a+b?

Trigonometry
I calculated it and a got a totally different answer

Trigonometry
Let N be a 5-digit palindrome. The probability that N is divisible by 4 can be expressed as \frac{a}{b}, where a and b are coprime positive integers. What is the value of a+b?

Chemistry
I keep getting 5.17 pH. but thats wrong. do I use the equilibrium values to plug into the equation?

Chemistry
Calculate the pH at the equivalence point for the titration of 0.130M methalamine (CH3NH2) with 0.13M Hcl. The Kb of methyl amine is 5.0x10-4.

Education
1. in a study examining preschoolers' responses to their peers distress, researchers used ___ to record each instance in which a child cried, followed by other children's reactions. a. time sampling b. systematic collection c. event sampling d. structured observation 2...

Math
If someone is attached to a 20 ft rope, which is attached to the corner of a building, how far can they move? If the bulding is 22 ft X 15 ft?

inequality
find the solution to the following inequality 2(2x-6)>x+3, then graph the solution.

College Chemistry
A temperature of 20o C is equivalent to approximately

Math
A field trip costs $8.50 per student. If 125 students are going on the trip and a total of $1011.50 has already been collected, how many students have not paid yet?

chemistry
it's octahedral: (ep) F - - F As F - - F Cl

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