# Posts by Riya

Total # Posts: 69

**maths**

Calculate the total present value today (to 2 decimal places) of the following cash flows: $300 due in 2 years from today $1,000 due in 5 years from today $200 due in 15 years from today Use an interest rate of 12% per annum.

**Math**

Find domain of tanx/tan3x

**English**

Ok, Thank you so much !

**English**

Working on a research paper and I decided my topic is drinking and driving. I need to go deeper since my prof doesn't just want us to simply "tell her stuff" as in it can't be a list. So I'm thinking of either talking about deeper issues like Punishment ...

**chemistry**

plz help me with the frequency factor value and activation energy value of diammonium phosphate production.

**Math**

A store owner bought some flower pots for $1,200.the flower pots were sold for $2,700,with a profit of $30 per pot.how many flower pots did she sell?

**Math**

105000

**Math**

A square field has an area of 6.25 km² find the cost of putting a fence round it at rs. 10.50 per meter

**Maths**

ABCD is a trapezium in which AB//DC and AB=70cm DC=50cm. If P and Q are respectively mid points of AD and BC. Find PQ and show that ar(trapezium DCQP)=9/11ar(trapezium ABQP)

**ENGLISH**

Can I see you today

**Physics C: Mechanics**

A 1.00 kg mass is attached to a string wrapped around a cylinder of radius 0.05m. Two masses are connected with a rod and attached to the end of the cylinder, perpendicular to its axis. as the mass falls from rest the rotating contraption spins through 12 pi radians in 1.2 ...

**Phyisics**

A horizontal shelf moves vertically with simple harmonic motion of period 1.5 sec. What is the greatest amplitude that the shelf can have so that the objects resting on it never leav it?

**Science**

1953) Sodium benzoate and benzoic acid are mixed in equimolar ration to form buffer if pKa is 2 what will be the pH? A. 0 B. 1 C. 2 D. any one

**Science**

A student goes to college,driving his car at 20 km per hour. He returns though same route ,driving at 40 km per hour . Find average speed during entire journey

**math**

294cm²

**physics**

The descending pulley has a radius R and mass M.Find the acceleration of block of mass m placed, on the smooth surface and connected with another light pulley.

**physics**

the descending pulley has a radius R and mass M.find the acceleration of block of mass m placed, on the smooth surface and connected with another light pulley

**physics**

average velocity =displacement/time=1000Km/15hr=200/3=200*1000/3*3600=500/27m/s

**physics**

average velocity = displacement/time=1000km/15hr=200/3=200*1000/3*3600=500/27m/s

**math**

F ind the product of two odd integers.

**math**

The measures of the angles of the quadrilateral are in the ratio 2:4:6:8. Find the measure of each angle.

**math**

There are 10 batmans. the runs scored by the batmans are 1,2,3,4,5,6,7,8,9 and 10. Find the average scored bt them.

**maths**

find the SI and amount of- $225 for 3 years 9 months at 16%p.a

**physics (gravitation)**

At what height above the surface of the earth does the acceleration due to gravity reduces by 64% .radius of earth 6400 km

**Grammar**

I beg you for forgiveness, if there is any incorrect evaluation. He is very young not advisable to assign to bigger tasks in the filed. Pls correct the mistakes.

**Algebra**

40 Year,13year

**ENGLISH - SITES**

please guide me to understand phrases with explanation.

**ENGLISH - GRAMMAR ????**

please guide me to understand phrases with explanation.

**chemistry**

A mixture of CO and CO2 having a volume of 20 ml is mixed with x ml of oxygen and electrically sparked. The volume after explosion is (16 + x)ml under the same conditions. What would be the residue volume if 30 ml of the original mixture is treated with aqueous NaOH? (a) 12 ml...

**maths**

how many cubes of side 1cm will make a cube of side 3cm

**MATH**

If the lengths of the sides of a triangle are in the ratio 8:4:5 and its perimeter is 48cm find its area

**computer**

how do cell phone works,answer in short paragraph

**Financial Math**

tisa received $5200 on a deposit she made five years and eight months ago. The interest rate was is 6.7% p.a. compounded quaterly. How much interest was included in amount he received?

**Financial Math**

An investment of $2500 accumulates at 6% p.a compounded semi annually for 3 years. At that time, the interest rate is changed to 5% compounded monthly. How much is the investment worth 2 years after the change in interest rate? What is interest gained at the end of the 5 years.

**MATHS - AREA**

The wall around a playground is 410m. If one wall along the length is 80m long, what is the length of the wall along the breadth? What is the area of the playground?

**MATHS - HCF**

Find the least number when divide by 25, 45, 60 leaves reminder 20. 2) Find the least number which when divided by 18, 12, 24 leaves a reminder of 16, 10, 22 respectively. Can U help me to find the answer.

**maths - hcf**

1) Find the least number when divide by 25, 45, 60 leaves reminder 20. 2) Find the least number which when divided by 18, 12, 24 leaves a reminder of 16, 10, 22 respectively. Can U help me to find the answer.

**maths - HCF**

Excellent. Thanks

**maths - HCF**

The product of HCF and LCM of two numbers is 119. Find the two numbers if one of the numbers is not 1. Please help me to solve this.

**grammar - tense**

I will at the airport. I will be a the airport. which statement is correct for simple future. Please explain the fact behind it.

**maths**

5x+3y=4 [eqn.1] 3x+4y=9[eqn.2] now, x=4-3y/5[eqn.3] Now putting the value of x in eqn.2 3(4-3y/5)+4y=9 12-9y/5+4y=9 12-9y+20y/5=9 12+11y=45 11y=33 y=3 And x=4-3y/5 x=4-3*3/5 x=4-9/5 x=-1

**Math 8th grade**

-24

**chemistry**

A commercially available sample of sulphuric acid is 15% H2SO4 by mass (density=1.10g/ml) Calculate the molarity ,normality and molality.

**chemistry**

for an aqueous solution having Calcl2 (2molar) and Mgcl2 (5molal) and specified gravity of solution is 1.145 calculate molality of chloride ion and molality if chloride ion.

**Math**

Each side of a rhomus is 10 cm if

**physics to Drwls**

a)(a) What is the spring constant of the spring? 51.3 N/m (b) Luke now pulls the brick 5.1 cm from the equilibrium position to watch it oscillate. What is the maximum speed of the brick? .35 m/s So would you subtract 2.55 cm from 5.1 cm? To get how much was stretched?

**physics**

Luke is trying to catch a pesky animal that keeps eating vegetables from his garden. He is building a trap and needs to use a spring to close the door to his trap. He has a spring in his garage and he wants to determine the spring constant of the spring. To do this, he hangs ...

**Physics to Elena**

Thank you, but I tried this answer its wrong and I don't know why!

**Physics**

So what is Vm m/s and Am m/s^2 Thank you!

**Physics**

The prong of a tuning fork moves back and forth when it is set into vibration. The distance the prong moves between its extreme positions is 2.28 mm. If the frequency of the tuning fork is 440.6 Hz, what are the maximum velocity and the maximum acceleration of the prong? ...

**physics**

Thank you so much; I really appreciate it!

**physics**

A spoked wheel with a radius of 44.0 cm and a mass of 1.90 kg is mounted horizontally on frictionless bearings. JiaJun puts his 0.550-kg guinea pig on the outer edge of the wheel. The guinea pig begins to run along the edge of the wheel with a speed of 18.0 cm/s with respect ...

**MATH**

The base and height of a triangle are in the ratio 5:3.if the area of the triangle is 67.5 square metre.find its base and height.

**MATH**

THE BASE AND HEIGHT OF A TRIANGLE ARE IN THE RATIO 5:3. IF THE AREA OF THE TRIANGLE IS 67.5 SQUARE METRE; FIND ITS BASE AND HEIGHT.

**algebra**

at least 17

**chemistry**

An aluminium can contains ferrous sulphate solution. It is observed that after a few days it develops holes in it. Explain the observation and write the chemical equation for it.

**Maths**

If a marble of radius 2.1 cm is put into a cylindrical cup of radius 6cm and height 8cm, then how much water flows out of it.?

**chemistry**

titration of phosphoric acid in presence of excess h2po4-, changes in equivalence point??

**math**

mujhe simple interest ka method samajh nahi ataa. question-a some of money double itself 10 year the number of year it wood trebles itself is.........

**8th grade**

Who was influenced negatively by the southern code of behaviour in the autobiography of miss jane pittman, and how?

**Chemistry**

Is that 40250000 is the right answer.

**SCIENCE**

TAKE A BOWL OF WATER AND PLACE IT NEAR A SUNLIT WINDOW. PLACE A MIRROR IN WATER AND USE A WHITE CARD AS 0SCREEN POINT.ADJUST THE MIRROR TO AN ANGLE WHERE IT PROJECTS THE COLOURS OF LIGHT ON THE SCREEN. TELL ME YOUR OBSERVATION AND EXPLAIN HOW THIS PHENOMENON OCCURS.

**science**

what is sublimation?

**sst**

how i make a poster on social evil

**pre-calculus-check over work**

1). change to exponential form: log2^256=8; 2^8=256 log0.0001=-4; 10^-4=0.0001 2). change to logarithmic form: 5^3=125; log5^125=3 4^-3=1/64; log4^1/64=-3 3). solve the equation: 3^(x-2)=27^(x+1) 3^(x-2)=(3^3)^(x+1) 3^(x-2)=3^(3x+3) x-2=3x+3 -5=2x -5/2=x 2^(x^(2)+1)=4^(x+2) 2...

**chemistry**

Thank you for your help.

**chemistry**

(1.3 atm)(29L)=(P2)(3.9) 9.66=P2

**chemistry**

A sample of gas occupies 29 L under a pressure of 1.3 atm. What would the resulting volume be if the pressure were increased to 3.9 atm if the temprature did not change?