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maath
Questions and answers by visitors named
maath
Questions (55)
The height of an object moving up and down is described by y=72+40cos18t (in degree mode). To at least three decimal places,
4 answers
1,885 views
Let F1 = (0,2), F2 = (0,-2), and P = (x,y). Use the distance formula to convert the equation PF1 + PF2 = 6 into Cartesian form.
6 answers
3,004 views
Explain the notation M^-1 used for the inverse of a square matrix M.
I thought M^-1 would be a normal inverse matrix except the
4 answers
644 views
The focal points of a hyperbola are (0,6) and (0,-6), and the point (5,6) is on one of its branches. Find coordinates for the
4 answers
1,023 views
One more question...
If you have f(x) = xsinx and the question is asking for the fourth degree Taylor polynomial about x=0, can
4 answers
2,513 views
There are many examples of graphs that have period 60 and whose y-values vary between -8 and 8. First, find a formula for such a
5 answers
1,479 views
Find a vector of length 3 that is perpendicular to [2,1,-2]
4 answers
2,176 views
Show that any dilation transforms any figure into a similar figure.
3 answers
418 views
Show that any dilation transforms any figure into a similar figure.
2 answers
613 views
Is tan(90-theta) the same as tan(theta)???
6 answers
329 views
The volume enclosed by a sphere of radius r is (4/3)πr^3. The surface area of the same sphere is 4πr^2. You may already have
3 answers
1,377 views
Show that the surface area of a sphere is two thirds of the total surface area of any cylinder circumscribed around the sphere
4 answers
1,144 views
How do you find the value of m in the equation y=k+asin(mx)?
6 answers
1,600 views
How do you write the chemical formula for ammonium acetate and ammonium hydrogen sulfate?
4 answers
673 views
You have a chemical sealed in a glass container filled with air. The glass container has a mass of 200.0 grams and the chemical
3 answers
935 views
Several compounds containing only sulfur (S) and fluorine (F) are known. Three of them have the following compositions.
i. 1.188
2 answers
617 views
A chemist in a galaxy far, far away performed the Millikan oil drop experiment and got the following results for the charges on
4 answers
1,907 views
Find p(p^-1(x)) when p(x)=x^2-4
I tried solving this and I got x^4-x+20 but that has no solution so I'm a little confused.
3 answers
307 views
What is the largest number of ions in any of your formulas? What is the total positive charge and the total negative charge in
3 answers
1,481 views
Terephthalic acid is an important chemical used in the manufacture of polyesters and plasticizers. It contains only C, H, and O.
4 answers
3,285 views
What is a quasi-martial law? I looked this up on google but there's no direct answer to it.
6 answers
2,556 views
Let F=(0,0) be the focus and the line y=-6 be the directrix. Plot several points P that are half as far from the focus as they
2 answers
844 views
Thallium(I) hydroxide is a strong base used in the synthesis of some organic compounds. Calculate the pH of a solution
2 answers
729 views
Find the focus and directrix for the parabola y=ax^2. What special meaning does the expression 1/(4a) have?
4 answers
998 views
What is the deeper meaning of the poem, "A Lover" by Amy Lowell?
This is her poem: "If I could catch the green lantern of the
2 answers
917 views
Calculate the average kinetic energy of the N2 molecules in a sample of N2 gas at 266 K and at 532 K.
I got 32.7 and 65.5 but
2 answers
665 views
Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 40. cm^3. If the combustion of
1 answer
678 views
A 5.00 g sample of aluminum pellets (specific heat capacity = 0.89 J/°C·g) and a 10.00 g sample of iron pellets (specific heat
4 answers
2,082 views
A 152g sample of ice at -37 degrees Celsius is heated until it turns into liquid water at 0 degrees Celsius. Find the change in
4 answers
2,053 views
The enthalpy of fusion of ice is 6.020 kJ/mol. The heat capacity of liquid water is 75.4 J/mol degrees Celsius. What is the
5 answers
5,089 views
Give the maximum number of electrons in an atom that can have these quantum numbers.
1. n = 3, ℓ = 2, mℓ = -1, ms = 1/2 2. n
3 answers
2,979 views
why do molecules and ions with the same number of atoms and valence electrons have the same or similar molecular shape?
1 answer
419 views
Why do some compounds and elements exist as a liquid at room temperature, while others are solids and gases? What forces are
6 answers
1,367 views
What is the probability that this year's graduation will fall on the birthday of exactly one of the 336 Seniors? What is the
4 answers
1,141 views
If three dice are tossed, their sum could be 7. What is the probability of this?
I'm guessing it's something to do with
3 answers
821 views
what is the absolute value of infinity? is it just zero?
2 answers
1,266 views
Suppose f(1)=1 and f'(x)≤2 for x≥0. Apply the MVT to the interval [1,x] to prove that f(x)≤2x-1 for all x>1. Verify all
4 answers
298 views
In the process of alcohol fermentation, 2 NADH molecules are converted to 2 NAH+ as energy from the NADH is used to drive the
1 answer
436 views
If F'(x)=√1+x^3 and F(1)=5, then what is F(3)?
(1+x^3) is all under the square root
1 answer
296 views
what happens when you change an OH to an H on a nucleotide?
1 answer
323 views
Find the length of the curve
y = x^2 - (1/8)lnx, 1 ≤ x ≤ e
4 answers
697 views
Find the area of the region bounded by the curve y=x^2*e^x and the x-axis, 0≤x≤1
3 answers
343 views
how do you take the antiderivative of √(1+4x^3)
1 answer
244 views
Humans have yet another antigen system on their red blood cells. The MN blood group refers to a different antigen controlled by
1 answer
437 views
Solve the following differential equation algebraically
dy/dx = xy^2 + 4x y(0) = 0 I reached the point dy/(y^2+4) = xdx but I
5 answers
1,213 views
In the recent century, the Belgium population grows following the logistic equation. Predict its population in 2020 given the
1 answer
361 views
Expand 4/(x^2+4) as a power series centered at 0.
4 answers
344 views
Does the series 1/n converge to zero? I know that it is a harmonic series, but shouldn't it converge because as x gets really
5 answers
421 views
Find the Taylor series centered at x = -1 for the function
f(x) = x(e^x)
3 answers
1,507 views
what are several ways to parametrize the parabola y=x^2?? or just how do you parametrize a parabola in general?
1 answer
317 views
If xy+x+y=1, find dy/dx.
1 answer
321 views
What's an example of a short problem where either the first or second derivative test can be applied but the first derivative
3 answers
303 views
What is an example of a convergent alternating series where the conditions of the alternating series test do not hold?
2 answers
518 views
When a ball is slowly rolled across a horizontal plane, why is the velocity constant? Is it because the rate of position
2 answers
213 views
What is the reciprocal modulo 28 of 5?
1 answer
196 views
