# Posts by joshua

Total # Posts: 702

Chemistry
how many molecules of sulphuric acid is needed to neutralize 5ml of potassium bicarbonate (iv)acid when calcium is heated at temperature 200 calcius using nickel as catalyst

math
51tens+9ones

Physics
a) Intensity from 1 person = i, from 5 people = 5i, reference level = i? dB = 10 log (i / i?) For 1 person .. 97 = 10 log (i/i?) .. log (i/i?) = 9.7 .. i /i? = 10^9.7 .. .. i = i? x 10^9.7 For 5 people .. i' = 5 i .. .. i' = 5 i? x 10^9.7.. dB = 10 log (i' / i?) ...

maths
87 1/2% of a number is 350. calculate 100% of the number

Math
Lupe* not lips. Sorry.

Math
1) a. Miguel says that you can easily separate numbers divisible by 2 into two equal parts. Do you agree? Why or why not? 1) b. Many says that if Miguel is correct, then you can easily separate numbers divisible by 3 into three equal parts. Do you agree? Why or why not? 1) c. ...

ENGLISH (ESSAY)
ESSAY ON THE TOPIC THE HARMATTAN

Math
Dylan has 765 cards in his baseball card collection. He sells 153 of the cards. What is the percent of decrease in the number of cards in the collection? i'm Lost I've been trying for about a good 20 minutes

Algebra
Using proportions and subtracting 765 and 153 you get 612 and divide that by 153 and get 4 and multiply it by 100

Algebra
Dylan has 765 cards in his baseball card collection. He sells 153 of the cards. What is the percent of decrease in the number of cards in the collection?

Math
The answer is 41/40 or 1 1/40.

Math
Mr. Ahn buys buys relishes for lunch party. He buys 7/8 pound of pickles and 9/10 pound of olives. How much altogether do these weigh?

Science
why would a piece of wood float on water and sink in methylated spirit

Geometry
Hi, I have a Benchmark test tomorrow and I don't understand how to calculate the probability of this problem. A fair coin is tossed and the spinner is spun. All outcomes on the spinner is equally likely. Find the probability of getting heads or landing on C.

Physics
A 95 kg halfback makes a turn on the football field. The halfback sweeps out a path that is a portion of a circle with a radius og 12 meters. The halfback makes a quarter of a turn around the circle in 2.1 seconds. Determine the speed, acceleration and net force acting upon ...

statistics
The distance travelled in a week by sales staff employed by a nationwide security firm is approximately normally distributed with a mean of 200 miles and standard deviation of 48 miles. a) less than 80 miles, b) more than 250 miles, c) between 100 and 300 miles. d) A reduced ...

Math
To completely factor 3x^2+12x Monica says the answer is x(3x+12). But Ashley says the answer is 3x(x+4). Who is correct, Monica or Ashley? Explain why. I know that Ashely is right right but I'm not sure how to explain it in the right terms.

Social studies

physics
A thin plate glass window with a refractive index 1.5 is tapered at a 5° angle. You are looking from the outside through such a window at an angle of 30° with respect to the normal and see a person standing there behind the window (very similar to the fish tank we ...

Math
Name the point with the given coordinates (4,-2).

Physics
You get a summer internship working with a 589.2nm laser (an intense light source with a very well defined wavelength). You want to spray some oil with noil=1.25 on your glasses with nglass=1.50 as an additional safety feature to protect you from accidental flashes of laser ...

Math
Given that the measurement is in centimeters of the circle to the nearest tenth (Use 3.14 for r)

The figure below shows two points in an E-field: Point 1 is at (X1,Y1) = (3,4) in m, and Point 2 is at (X2,Y2) = (12,9) in m. The Electric Field is constant, with a magnitude of 68 V/m, and is directed parallel to the +X-axis. The potential at point 2 is 588 V. Calculate the ...

Math
"What is the slope of the line that passes through the pair of points (3/2, -2) and (-3, 7/3)?" A. -27/26 B. -26/27 C. 26/27 *** D. 27/26

Math
The roots of the quadratic equation z^2 + az + b = 0 are 2 - 3i and 2 + 3i. What is a+b? Can you please help me with this question?

ELA
Over the weekend, she scored the winning soccer goal for our team! Which of the underlined words in the sentence is a subjective case pronoun? A) Over B) she C) the D) our

Chemistry
what is the lowest frequency photon that can ionize a hydrogen atom with excited state electron configuration 3s1

Chemistry
electrons are ejected when a metal is irradiated with 570 nm light. if the wavelength of the ejected electrons is 1.0 nm, what is the work function of the metal? The answer is 1.08 X 10^-19 J, but I dont know how to get here

Math
figure RSTU is a rectangle. if m of angle SUT = 3x + 6 and m of angle RUS = 5x - 4, find m of angle SUT

Physics
Two identical loudspeakers are 2 m apart. A person stands 4.6 m from one speaker and 3.4 m from the other. What is the lowest frequency at which destructive interference will occur at this point?

MATHS
Find all possible solutions in the range 0°? x ? 180° of the following equations: (a) cos x = sqrt(2) / 2 (b) tan x = sqrt(3) / 3 (c) sin x = sin60° (d) cos x = -1/2 (e) sin x = -1/2

maths
for a teacher you have a bad attitude. FIX IT!!!!!!!

maths
a shape ABCDE is made up of an isosceles triangle and a rectangle. The perimeter of ABCDE is 46cm. What is the length of AB?

maths
A shape ABCDE is made up of an isosceles triangle and a rectangle. The perimeter of ABCDE is 46cm. 1) what is the length of AB?

maths
A shape is made up of a triangle and a rectangle. The perimeter of ABCDE is 46cm. What is the length of AB?

maths
thank u Ms. Sue

maths
40

maths
90 marbles are shared among 3 friends. Dave gets 10 more than Lall, who gets 10 more than lee. How much does dave get?

maths
karim has \$15 more than Jack. Together they have \$55. How much does each person have?

maths
kay has \$15 more than kim. Together they have \$55. How much does each person have

maths
Three numbers add up to 180. The second number is twice the first, and the third number is three times the first. WHAT IS EACH NUMBER?

maths
the net of a cube has an edge of 5cm. calculate the perimeter

maths
A farmer bought 3 1/2 dozen eggs. Fourteen were bad. a) what fraction were bad? b) What percentage were good? c) If the eggs cost \$18.00 per dozen. How much did he pay for the eggs?

maths
david gave 1/5 of his oranges to his brother. his brother got 15 oranges. he gave his friend donny 1/3 of the remainder. a) how much oranges did david have originally? b) how many did donny get? c) how many oranges was david left with?

math
209.25

math
Saha spend 55% of her savings on a game. She has \$135 remaining. how much was her savings before buying the game

Math
2010000

math
the number has 5 digits the value of the largest digit is 90,000 the value of the thousands place is the same value in every place the sum of the hundreds place and the tens place is 7 the value of the smallest value is 4 97,774

maths
What is the length of an arc of a circle that subtends 2 1/2 radians at the centre when the radius of the circle is 8cm

science
Two concentric conducting spherical shell have raddii R1=0.145m and R2 =0.207m. The inner sphere with negligible speed. Assuming that the region between the sphere is a vacuum, compute the speed with which the electron strikes the outer sphere.

algebra
Just go into old lessons and write down notes. Then make up problems and practice. IF you need help, you should try Khan academy.

algebra

algebra
Guessing connections academy or homeschool? Please, they do not want you to cheat, my friend.

Algebra 1
Emmanuel was speaking with a friend from another country. His friend told him that the speed limit on most highways is 100 kilometers per hour in her country. This speed sounded fast to Emmanuel. Approximately what speed is this in miles per hour? Round to the nearest whole ...

Math
If two fair dice are​ rolled, find the probability that the sum of the dice is 6​, given that the sum is greater than 3.

Math
The scale of a road map is 1 cm to 4 km.if the church and the city hall are 4 cm apart on the map.how many km apart are they in actual distance

Chemistry
What is the concentration of a monoprotic weak Acid if its pH is 5.50 and its Ka= 5.7 x 10^-10?

math
the sum of two numbers is 25. the second number is 5 more than the other one. find the numbers.

PHYSICS
on a partime job you are asked to bring a cylindrical iron rod of legnth 85.8 cm and diameter 2.85 cm from a storage room to a machinist. will you need a cart? (to answer calculate the weight of the rod.)

math
the product of three numbers is 315.if two of the numbers are 7 and 9 .what is the third number?

Object Oreinted Programming in java
write a program that Enter price item,Enter No: of Items and Total Due of Items.Subtract 0.5 to TotalDue and , Print The total Amount.

physics
a uniform rod 100cm long and weighing 50N is supported in a horizontal position on a fulcrum with weights 80N and 100N suspended from its end. compute the position of a fulcrum.draw the illustration.

Math
Find the standard equation of the circle concentric with x^2+y^2-12x-10y = -12 and has a diameter of 10. I have been trying to solve this all day, can you please help me :(

Chemistry
558000

Physics
A circuit employs a silicon solar cell to detect flashes of light lasting 0.25 s. The smallest current the circuit can detect reliably is 0.32 μA . Assuming that all photons reaching the solar cell give their energy to a charge carrier, what is the minimum power of a ...

math
Cynthia has a bag of jellybeans. There are two red jellybeans, one yellow jellybean, and two black jellybeans in her bag. Cynthia grabs two jellybeans and gives them to her friend, Pedro, and he eats them. What is the probability that she gives him two red jellybeans?

Physics
2.314814815E-05

Physics mechanics
Two identical 17.7-kg balls, each 23.9 cm in diameter, are suspended by two 35.0-cm wires as shown in the figure (Figure 1) . The entire apparatus is supported by a single 18.0-cm wire, and the surfaces of the balls are perfectly smooth. what is the tension in the top wire?

math
two boats p and q are at points whose position vector are 4i+8j and 4i+3j respectively. both of the boats are moving at a constant velocity of p is 4i+j and q is 2i+5j. find the position vectors of p&q and pq after t hours, and hence express the distance between p and q ...

Math
20 black tiles

chemistry
200cm3 of each of 0.1m of solutions of lead (ii) trioxonitrate (v) and hydrochloric acid were mixed. Assuming that lead (ii) chloride is completely insoluble, calculate the mass of lead (ii) chloride that will be precipitated.

After making a dot plot, Julie asked Kevin what size shoe he wore. She then added together the total of all the shoe sizes including Kevin's. The total was 139. What size shoe does Kevin wear?

trigonometry
Nikki bought a triangular lot whose sides are 9 meters, 12 meters, and 15 meters long. if it cost her 3500 pesos per square meter, how much did she pay for the lot?

Health
You may need to see a doctor if ________.

Health
How long do anxiety disorders last? A .at least two years b. at least one year c. at least 6ix months d. at leaks 6 weeks D?

Physics
The temperature of 2.0 g of helium is increased at constant volume by ΔT. What mass of oxygen can have its temperature increased by the same amount at constant volume using the same amount of heat? I know for constant volume I should use the equation: Q=mCsubvdeltaT I ...

Math
0.6 gallons

scale drawing
1500

scale drawing
the distance betw two towns on a map is 15cm calculate the ground distance if the scale of the map is 1:50,000

math
I am having problems starting of the equation . I understand how to do it but have a hard time setting it up correctly.

math
a rectangle has a width of one less than the length . if the perimeter is 30 units , what is the length and width ?

math
according to information from NASA, the space shuttle has a capacity of about 500,000 gallons of fuel. Write three numbers that could represent the space shuttle's actual fuel capacity? I don't understand the question.

math
if a person walks 2.4 miles in 1.5 hours, how far can he walk in 3hours

math
Ms.Sue I did \$10 divided by 4.5 pounds to get 2.22222 repeating. i rounded it and got 2.22 dollars

math
if 4.5 pounds of cherries cost \$10, what is the unit price per pound

math
Ms.Sue i still don't get this problem may u explain

math
If a person walks 2.4 miles in 1.5, how far can he walk in 3 hours

Science
pH values of 12,6,10.5 and 4.3.which of these is acidic and basic

Science
Thanks Deshawn

Math
Which of the following is equal to the expression below?

science
sorry i cant help you there i know all the answers to the fill in the blank but not this and were you doing this in conexus academy that is the homeschool that i go to

math
A merchant purchased a number of coats, each at the same price, for a total of \$720. He sold them at \$40 each, thus realizing a profit equal to his cost of 8 coats. How many did he buy

math
It takes B 6 hours longer than A to assemble a machine. together they can do it in 4hr. how long would it takes each worker alone to do job

math

Programming
using c++ write a program that accepts the unit weight of a bag of coffee in pounds and the number of bags sold and display the number of bags sold ,the weight per bag price per pound sales tax and total price of the sale.the unit of a bag of coffee is valued as \$5.99 pound ...

Science
he is right

Physics
Horse canters away from its trainer in a straight line moving 130 m away in 16.0 s. It then turns abruptly and gallops halfway back in 4.3 s? (a) Calculate its average speed. (b) Calculate its average velocity for the entire trip, using "away from the trainer" as the...

MATH
Hey we almost have the same name!

Mathematics
two brothers Peter and Paul owns a store. if there share ratio of store value 3 ratio 5, later peter sold 2/3 of his share to Paul for 8000 naira. what is the value of the goods in the store.