Wyzant Ask An Expert

11/22/24

I keep getting this one question wrong on my homework and I can’t see why

The wavelength of the laser beam used in a compact disc player is 663 nm. Suppose that a diffraction grating produces first-order tracking beams that are 1.18 mm apart at a distance of 3.46 mm from... more

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Calculus

11/22/24

I need help with this problem. It is a differential equation.

The following differential equation is used to model population growth in an environment with limited resources. y' = 0.2y (1- y/85)Find the values of y at which the population is in... more

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Calculus

11/21/24

Direction Fields and Numerical Methods

Use Euler's method with step size 0.4 to estimate y(0.8), where y(x) is the solution of the initial-value problem y' = -3X-2 +y^2, y(0) = -1 what is y (0.8)?

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English

11/21/24

An American Plague

What is most closely a central idea from this excerpt of An American Plague? Answer choices for the above question A. Rush himself was suffering from yellow fever at the time of his visit to... more

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Gis

11/21/24

How do I make a map layer file from a public .mdb file?

In either QGIS or ArcGIS, I want to pull in the data provided by NRCS WebSoils. I have it in the form of a zipped folder that includes an .mdb. I have tried simply dragging the mdb to the map, as... more

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Calculus

11/21/24

Power series Question

Suppose that ∞∑ cn x nn = 0 converges when x = −4 and diverges when x = 6. What can be said about the convergence or divergence of the following series?∞∑ (−1)ncn7n n = 0When compared to... more

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English

11/21/24

What is the difference between descriptive and informative essay?

One uses words, and the other uses facts.

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General Music

11/21/24

How is it determined what key playing or singing in by looking at the music?

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Chemistry

11/21/24

How to get ion size using Debye-Huckle question

Given the activity coefficients for an ion with z = 2 in solution as a function of the ionic strength. Find the ion size, α, of this species. ie Given data is Ionic Strength and Activity Coefficient

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Calculus

11/21/24

Graph the integrand and use known area formulas to evaluate the integrals.

Graph the integrand and use known area formulas to evaluate the integrals.∫-1 to 1 (1+√(1-x2))dx

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Calculus

11/21/24

Graph the integrand and use known area formulas to evaluate the integrals.

Graph the integrands and use known area formulas to evaluate the integrals∫-1 to 1 (2-abs(x))dx

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Calculus

11/21/24

Graph the integrand and use known area formulas to evaluate the integrals.

Graph the integrand and use known area formulas to evaluate the integrals.∫-1 to 1 (1-abs(x))dx

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Arabic

11/21/24

Why Arabic is called the language of "ض"?

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Science Chemistry

11/21/24

Hi! So for this question my teacher is saying that 4 bars into the circle is correct. Can anyone explain why?

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Math

11/21/24

A test has 20 questions worth 100 points. The test consists of true/false questions worth 3 points each and multiple choice questions 11 points each. How many multiple choice questions are on the test

Graph your equations.

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Nursing Medical Coding

11/21/24

When submitting an insurance prior authorization request pre-service, what is the Department of Labor turnaround time?

The Dept of Labor turnaround time (TAT) is the timeframe in which a determination must be made on an authorization request. A pre-service request is placed prior to a service such as procedures,... more

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Math

11/20/24

help me pleasee im stuck

Liam has a points card for a movie theater.He receives 50 rewards points just for signing up.He earns 12.5 points for each visit to the movie theater.He needs at least 160 points for a free movie... more

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Calculus

11/20/24

Find the length of the curve.

x=9t-3t^3, y=9t^2, 0<_t<_3

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Algebra 1

11/20/24

The first term of a sequence is -12. The recursive formula for the sequence is an = an-1 + 9. What are the next 3 terms in the sequence?

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Biology

11/20/24

How do epigenetic modifications influence gene expression, and what are the implications of these changes in health and disease?"

Epigenetic modifications, such as DNA methylation and histone changes, regulate gene expression by altering the structure of DNA and chromatin, without changing the genetic code. These... more

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Algebra 2

11/20/24

Write a linear function g with the given values. g\left(0\right)=9 , g\left(8\right)=7

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Algebra 2

11/20/24

How to solve this problem using Elimination?

Movie Ticket Sales ProblemA movie theater sells tickets at different rates: child (x), adult (y), and senior (z). On Monday, the theater sells 50 child, 100 adult, and 25 senior tickets for... more

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Special Needs

11/20/24

Special Ed tutors

I'm looking for a tutor that specializes in working with sped students

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Math Geometry Trigonometry

11/20/24

what is the slope of the line through (0,-2) and (3,-4).

I heard about you guys on YouTube and Instagram

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Math

11/20/24

Solving for equations

Ax+By=c for x

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