# 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**

answers to the test please!!!!

**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)

**Physics 2 Please help **

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**

Khan Academy should help.

**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.

**fourth grade math**

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 HELP PLEASE**

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.

**reading**

30-day Money Back Guarantee Groom Co. electric shavers come with a 30-day money back guarantee. The only stipulation is that you use your new exclusively for 2 weeks to become accustomed with the product. If you are not satisfied, we will refund the amount on your receipt if ...