06/01/22

Use the given information to find the left- and right-hand Riemann sums for the following function. If necessary, round your answers to five decimal places. f(x)=x2+3 a=−3 , b=6, and n=7
You can round to 5 decimal places - but please provide the whole number for me so I can round it myself.
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06/01/22

Calculate ΔH for the reaction
Calculate ΔH for the reaction:2N2 (g) + 6H2O (g) → 3O2 (g) + 4NH3 (g) 
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06/01/22

Work Done on an Incline (highschool level)
A girl pushes a 20.0 kg box, initially at rest, up a friction-less 10.0m long ramp inclined 30.00 degrees above the horizontal. If the final velocity of the box at the top of the ramp is 1.00 m/s,... more
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05/31/22

A rectangular pool has a width of 15 feet and a length of 20 feet. If there is a 2 feet wide walkway around the pool, find the area of the walkway.
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05/31/22

find the rate at which water is being pumped into the tank in cubic centimeters per minute.
Water is leaking out of an inverted conical tank at a rate of 8200.0cubic centimeters per min at the same time that water is being pumped into the tank at a constant rate. The tank has height 15... more
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05/30/22

Coffee virtual lab
An eccentric Chemistry teacher orders a coffee to be made that is at exactly 78.6 Celsius.  He requires that you start with 189 mL of coffee heated to 91.3 celsius.  You must add Milk from the... more
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05/30/22

Find all the values of C satisfying the given conditions: f(x)=x^2-7x+18 and f(c)=6
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05/29/22

Suppose that resting pulse rates among healthy adults are normally distributed with a mean of 78 beats per minute and a standard deviation of 10 beats per minute.
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05/28/22

Help me this business mathematics

A salesperson received a bi-weekly salary of P4,300 and 9 1/2% commission on total sales. Find the monthly income if total sales for the month amounted to P9,827. ?
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05/28/22

Solve for the following

In the following exercises, find the area of the region by integrating (a) with respect to x and (b) with respect to y. (c) Compare your results. Which method is simpler? (d) In general, will this... more
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05/28/22

Use synthetic division to determine if the given value for k is a zero of this polynomial. If not, determine p(k).
Use synthetic division to determine if the given value for  is a zero of this polynomial. If not, determine p(k).p(x)=3x^2−(5−5i)x+(28−20i);k=−4i
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05/27/22

I am stuck on this question can I get some help
Compare the area of the bases. If a base has a greater area, it will take up more space on the shelf.Base area of Box 1: 3x2Base area of Box 2: 4x2 – xWhich box is likely to occupy more space on... more
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05/27/22

help!! how do i do this?
how many moles of sodium cations, Na+, are dissolved in a 1.0L sample of:0.10M NaCl3.0M Na2SO40.30M Na3PO4
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05/27/22

How many grams of CO2 are formed from the combustion of 22.7 moles of C8H18?
Octane burns according to the following balanced equation:2C8H18 + 25O2 --> 18H2O + 16CO2How many grams of CO2 are formed from the combustion of 22.7 moles of C8H18?
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05/27/22

How many moles of ethanol are in 5.20 X 1026 molecules of ethanol?
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05/26/22

physics question
The initial velocity of a military jet is 210 m/s eastward. The pilot ignites the afterburners, and the jet accelerates eastward at a constant rate for 1.70 s. The final velocity of the jet... more
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05/26/22

If 75.0 grams of NaCl are added to 1.00 kg of water resulting in 1.00 L of solution, which of the following would be true? (options in notes)
boiling point would increasefreezing point would increasevapor pressure would increaseconcentration = 1.30 Mboiling point would decreasefreezing point would decreasevapor pressure would... more
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05/25/22

(a) Find the tension in the string connecting masses M1 and M2. (b) Find the tension in the string connecting masses M2 and M3.
A hanging mass, M1 = 5 kg, is attached by a light string that runs over a frictionless pulley to the front of a mass M2 = 3.5 kg that is initially at rest on the table. A third mass M3 = 4 kg,... more
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05/25/22

potential energy
A particle of mass 1.1 kg moves under the influence of a potentialU(x) = a/x + bx (a=3 and b=2.5). The particle's motion is restricted to the region x>0.the force acting on the particle is a/x^2... more
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05/25/22

The diameter of a spherical ball bearing was measured to be 5 mm with a possible error of 0.09 mm. State answers exactly or to 4 decimal places.
a) Use differentials to estimate the maximum error in the calculated volume. _____ mm3 b) Use differentials to estimate the relative error in the calculated volume. _____
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05/25/22

A football coach sits on a sled while two of his players build their strength by dragging the sled

A football coach sits on a sled while two of his players build their strength by dragging the sled across the field with ropes. The friction force on the sled is 1.2  and the angle between the two... more
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05/24/22

Moment of inertia

A 0.225 m radius solid sphere has amoment of inertia of 0.123 kg-m².What is its mass?(Kg) can someone please answer this ?
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05/24/22

which situation will have bigger error
Yo‎u are prep‎aring a b‎uffer with pH = 5. To prep‎are the bu‎ffer you dec‎ided to calcul‎ate ho‎w much so‎lid sodiu‎m ace‎tate you need to pre‎pare and vol of 1M a‎cetic aci‎d. You also decide‎d... more
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05/23/22

Calculating the solubility of calcium carbonate at set pH values
Calculate the solubility of CaCO3 Ksp=3×10^-9 in a buffered solution with a pH=6.82 and 8.98, please? The working behind this would be appreciated.
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05/21/22

probability question
Bag A contains 7 blue and 3 red marbles. Bag B contains 6 blue and 4 red marbles.Firstly, a marble is chosen at random from Bag A and and placed in Bag B. Secondly, a marble is chosen at random... more
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