59,303 Answered Questions for the topic Math

11/05/23

The pH scale for acidity is defined by pH=−log10[H+]
 The pH scale for acidity is defined by pH=−log10[H+] where [H+] is the concentration of hydrogen ions measured in moles per liter (M). A solution has a pH of 3.9. Calculate the concentration of... more
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11/05/23

calculus help!!
Consider the curve e^x^2 − y = y^7x + 8. Using logarithmic differentiation find dy/dx. Give the answer as a function of both x and y. dy/dx=
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11/05/23

calculusss help urgent
Write the first derivative of the given function.f(x) = x3/2ln(x)f'(x)= x^1/2 + ((3x^1/2)ln(x))/2this is correctFor which x-values does f(x) have horizontal tangents? (Enter your answers as a... more
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11/05/23

calculus helpp!!!!!
A volcanic cone spews fine particles of rock which land in the surrounding area and cause the size of the cone to increase.(a) Suppose that a volcanologist takes measurements that show that when... more
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11/05/23

pleaseee help!!. Calculus!!!...

A large sphere of material is placed in a dissolving liquid.(a) When the radius is 1 m, it is observed to be changing at 7 cm/hour. At that instant, what is the rate at which the sphere's volume is... more
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11/05/23

Calculusss Helppp!! Urgent..please help with this one!!!
Suppose that fluid is leaking from an overhead pipe and spreading in the shape of a circle on the ground. If the radius of the circle is increasing at a rate of 0.5 feet per minute, how fast is the... more
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11/05/23

Calculusss Helppp!! Urgent..please help with this one. i tried every method i know, keep getting it wrong. help out!!!
A road running north to south crosses a road going east to west at the point P. Car A is driving north along the first road, and car B is driving east along the second road. At a particular time... more
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11/05/23

Distance, Rate, and Time
Jack leaves Kingstown at 1:00 P.M. and drives to Queensville, 160 mile distant, at 45 miles per hour. At 1:15 P.M. Jill leaves Queensville and drives to Kingstown at 40 miles per hour. At what time... more
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11/05/23

At the beginning of an experiment, a scientist has 224 grams of radioactive goo.
At the beginning of an experiment, a scientist has 224 grams of radioactive goo. After 105 minutes, her sample has decayed to 7 grams.What is the half-life of the goo in minutes?Find a formula... more
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11/05/23

The apparent magnitude (how bright an object appears to the observer) is given by
The apparent magnitude (how bright an object appears to the observer) is given by M=(5/2)log(b0/b) where b is the brightness of the object and b0 is a positive constant. A particular telescope is... more
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11/04/23

STATS HELP PLEASE
I need help with STATS homework please. I tried twice already on A thinking that the random variable was a "random selected night" however it tells me that this is wrong for the answer. I tried... more
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Math Calculus

11/04/23

Calculus 1: f(x) = ln(2 + sin(x)), 0 ≤ x ≤ 2𝜋
f(x) = ln(2 + sin(x)), 0 ≤ x ≤ 2𝜋Find the interval(s) on which f is concave up. (Enter your answer using interval notation.)Find the interval(s) on which f is concave down. (Enter your answer using... more
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Math

11/04/23

Translate this sentence into an equation
The sum of 19 and Carlos's score is 68
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11/04/23

AMC 10, Base That Makes a Difference Indivisible by Three
Which integer value of b makes it so that when you subtract the base-bb number 221b ​ from 2021b​, the result isn't a multiple of 3? The choices are:(A) 3 (B) 4 (C) 6 (D) 7 (E) 8
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Math Algebra 2

11/04/23

Help with a Tricky Number Problem for AMC10 Prep
I need to find two whole numbers that together add up to 17,402. One of these numbers is a multiple of 10, and if you take away the last digit (which is a zero), you get the other number. I've... more
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11/04/23

According to the Jukes-Cantor model, given a proportion p of sites with different nucleotide sequences, the expected number of evolutionary changes between the two sequences is
According to the Jukes-Cantor model, given a proportion p of sites with different nucleotide sequences, the expected number of evolutionary changes between the two sequences is ... more
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11/04/23

Find the solutions of the equation in the interval [−2𝜋, 2𝜋]. Use a graphing utility to verify your results. (Enter your answers as a comma-separated list.) tan(x) = −1
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11/04/23

A sine curve with a period of 8𝜋, an amplitude of 5, a left phase shift of 𝜋/4, and a vertical translation down 4 units.
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Math

11/04/23

profit made on the apples sold
I pay $8 for 5 apples. I then sell them at 3 for $10. I bought p apples last week and sold all of them making a profit of $78. find p
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Math

11/04/23

At the beginning of an experiment, a scientist has 344 grams of radioactive goo. After 60 minutes, her sample has decayed to 43 grams. What is the half-life of the goo in minutes?

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Math

11/04/23

Ellie can make 6 friendship bracelets each day and she has already made 400 bracelets. How many days are left until she makes 860 bracelets?
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Math

11/04/23

Q2 Mechanics - Rational Functions
Determine the equation of the rational function with the following characteristics:Vertical asymptotes at x=−1and x=2x-intercept at (−2,0)horizontal asymptote of y=2goes through the... more
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11/03/23

Determine the observed rotation angle (α) (for part A). Determine the observed rotation angle (α) (for part B).
Part A: The specific rotation ([α]) of Unknown molecule (name is censored on this website but is not relevant for answering the question) in chloroform solvent is -16.3 degrees. determine the... more
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Math

11/03/23

I need help on math

The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 46 ounces and a standard deviation of 5 ounces.Use the Standard Deviation... more
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Math

11/03/23

Translating a sentence into a multi-step equation PLEASE HELP ASAP
Nine times the sum of a number and 3 equals 2.
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