11/17/24

Add a child to my account

The email on file is mine and I'm the one to decide which tutor to go with. How do I add my child so they can be in contact with the tutor themselves?Do they each have to open accounts? We're in... more
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10/05/22

what is the answer?
Consider the reaction.2Pb(s)+O2(g)⟶2PbO(s)An excess of oxygen reacts with 451.4 g of lead, forming 352.5 g of lead(II) oxide. Calculate the percent yield of the reaction.percent yield:
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10/05/22

Enter your answer in m/s
A truck with a crate in its bed drives around a horizontal circular turn of radius 27.4 m. The crate is held in place only by static friction, and the coefficient of static friction between the... more
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08/24/22

Balance the redox reaction
HNO3- + H2S → NO + S + H2O
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08/24/22

Balance the redox reaction of the following
K2Cr2O7+HCl=KCl+CrCl3+H20+Cl2
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05/23/22

Question 10 on Precalculus

f(x)=x^3+3x^2-9x+5Math problem on pre calc
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05/22/22

Can someone please answer this

Write the balanced chemical equation for the reaction between carbonic acid and copper (II) hydroxide.Start by writing the proper names of the products below.Carbonic acid + Copper (II)... more
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05/18/22

Consider the series ∞Σn=1 1/n(n+1) Write the series using sigma notation. and 
Write down the first four terms in the sequence of partial sums, and then find the exact formula for the N-th partial sum.Use the exact formula to determine if the series converges or diverges. If... more
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05/12/22

Approximate the area under the curve
Approximate the area under the curve y=2x from x=3 to x=5 using a Right Endpoint approximation with 4 subdivisions.
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05/11/22

Can someone please answer this question

A steel tank contains a mixture of Ar and He gases. The total pressure in the tank is 4818 mmHg. If the partial pressure of helium in the tank is 1653 mmHg, what is the partial pressure of argon in... more
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05/10/22

Calculus Question
I have created a scatter plot and the exponential function I found is y = 30e-0.004t. I need help solving the rest of the questions. A brief explanation of each part will also suffice.Codeine... more
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05/03/22

Acid pKa of heart medicine

A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research technician at Pharma-pill, you are told that X-281 is a monoprotic weak... more
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05/03/22

Find the relative growth rate
A common inhabitant of human intestines is the bacterium Escherichia coli. A cell of this bacterium in a nutrient-broth medium divides into two cells every 20 minutes. The initial population of a... more
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05/03/22

How do I find out what kind of asymptote a function has without a graph?

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04/26/22

Decide whether or not the given integral converges
Note: You may need to assume the fact that lim M→+ ∞ Mne−M = 0 for all n.Decide whether or not the given integral converges-4∫1/x^2dx-∞(a)Is the integral a convergent or divergent?(b)If the... more
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08/27/18

If the plane is 2200 feet above the ground and the jump lasts 85 ​seconds, how high above the ground was the skydiver 40 seconds after he​ jumped?
Calc word problem, solve using linear equation knowledge
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07/31/18

Integration
A particular moves on x-axis so that its position at time t is s(t)= (t2-t)/ t-1. at what value(s) of t the velocity is zero?
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09/18/17

Simplify the following expression. ​g(F(f(x)))
Let f(x)=x2-8, g(x)=x3, and F(x)=  1                                                x−1. Simplify the following expression.g(F(f(x)))
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02/07/17

calculus. How to integrate?
Evaluate the definite integral. The boundary is from 0 to √3/5   ∫ 1/(1+25x2) dx
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02/07/17

Calculus. How to solve integrals?
Find the indefinite integral   ∫ (e2x)/(25+e4x) dx
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11/14/16

Wht the word problem answer?
matthew made a bookcase,the cost of making the bookcase was $647.50.after the book case is sold, the shopkeeper recieves 15% of the selling price, Matthew make profit of $160 , calculate the... more
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11/14/16

There were 288 students attending a trip. 4 buses were filled, and 8 students traveled separately in a car. How many students were in each bus?
help please
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11/13/16

Bus. Calc dimensions
For reasons too complicated to explain, I need to create a rectangular orchid garden with an area of exactly 169 sq. ft. abutting my house so that the house itself forms the northern boundary. The... more
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04/28/16

Samantha needs to mix a 20% saline solution with a 40% saline solution to create 200 millileters of a 26% solution. How many millileters of each solution must S
Samantha needs to mix a 20% saline solution with a 40% saline solution to create 200 millileters of a 26% solution. How many millileters of each solution must Samantha use?
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04/28/16

a large box measures 4 ft by 7 ft by 3 ft. Find the volume of the box. Convert your answer to in3
  large box measures 4 ft by 7 ft by 3 ft. Find the volume of the box. Convert your answer to in3
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