05/23/21

are my answers correct?

a. a function changes from a decreasing interval to an increasing interval-we can conclude that there is a local minimumb. lim x approaching 0+ f(x) = -∞ lim x approaching 0- f(x) = ∞-we can... more
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05/22/21

how to find the intervals of concavity and points of inflection
f(x) = x2 / x2-4i did the quotient rule and got f '(x) = 8x2 / (x2 - 4)2f '(x) = -8x (x2-4)-2and then i gotf" (x) = 16x (x2-4)-3 (2x)= 32x2(x2-4)-3or f " (x) = 32x2 / (x2 - 4)3i need help finding... more
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05/22/21

Stoichiometry help please
Given: 2K + Cl2 = 2KCl If 0.143 grams of K and 0.236 grams of Cl2 react to form Potassium Chloride, how much Potassium Chloride can be formed? (Hint - you are finding the limiting reactant.) How... more
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05/21/21

Sketch a Graph of a Function that satisfies the following conditions
f is continuous and oddf'(x) = 2x if 0<x<2f'(x) = -2/3 if 2<x<5f'(x) = 0 if x>5
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05/21/21

Identify the simplest polynomial function having integer coefficients with the given zeros 0, -4, square root 3
a. P(x) = x4 + 4x3 − 3x2 − 12xb. P(x) = x3 + 4x2 − 12x − 3c. P(x) = x3 + 4x2 − 3x − 12d. P(x) = x4 + 4x3 − 12x2 − 3x
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05/21/21

calculating number of ions
A sample of ammonium nitride ((NH4)3N) has a mass of 3.22 g.(a) How many NH4+ ions are present?  ions (b) How many N3- ions are present?  ions 
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05/21/21

Problems involving Geometry (Pythagorean Theorem)
How long is the ladder which makes an angle of 30° with the side of the house and whose foot is 104 cm away from the base of the house? Show your solution.
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05/21/21

Find the relative extreme values of the function f(x) = x 3 3 − x 2 2 − 6x + 5.
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05/19/21

How many real solutions exist for this system of equations?
y = x2 + 4y = 4xA. zeroB. oneC. twoD. infinite
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05/14/21

Pre Calc HELP high school/college
To measure the height of the cloud cover at an airport, a worker shines a spotlight upward at an angle 75° from the horizontal. An observer D = 580 m away measures the angle of elevation to the... more
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05/14/21

If you are given the equation for a circle as (x+9)2+(y+7)2=289 what is the center and radius?

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05/14/21

Grade Calculator Help
I had 6 tests worth 50%I got 84,80,76,76,76,74I had one exam worth 5%I got 22/30what do I need to get on my final exam worth 25% to maintain at or above 76%And how many questions can I miss?the... more
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05/14/21

Proving in Geometry
Given: AB ∥ DEProve: ΔABC ≅ ΔEDCThe figure is like an hourglass and the midpoint C.What is the reason/theorem in these given statements:AB ∥ DE -∠A ≅ ∠E ; ∠B ≅ ∠D -∠1 ≅ ∠2 -ΔABC ≅ ΔEDC -
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05/14/21

What does it mean for angles to be coterminal? Can I have an example?

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05/13/21

why does log296-log23=5?
log296-log23=5
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05/13/21

Calculus Test review problem
Use limits to compute the following derivatives:f'(3), where f(x) = x2 - 2x + 1
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05/13/21

Calculus AP AB question: given the function f'(x)=-x(x-4)^3(x-2)(x+1) what conclusion can be drawn directly from the sign chart of the given function about the graph of f when x=2?
Calculus AP AB question: given the function f'(x)=-x(x-4)^3(x-2)(x+1) what conclusion can be drawn directly from the sign chart of the given function about the graph of f when x=2?
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05/12/21

How do I find the surface area of a cone with just the radius and the height?
I have to find the surface area of a cone with a radius of 45.7 mm and a height of 39.7 mm there’s also a hint that tells me to use the Pythagorean theorem to calculate the slant height..
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05/12/21

Probability question (2)
You have a bag of candy filled with pieces that are all the same size and shape. 4 are gumballs and 6 are chocolate. You draw a gumball out, decide you don't like it, put it back, and select... more
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05/12/21

Let m(x)=f(g(x)) and n(x)=g(f(x)). Using the table below give m(1)=______and n(1)=_______.
Let m(x)=f(g(x)) and n(x)=g(f(x)). Using the table below give m(1)=______and n(1)=_______. x 0 1 2 3 4 5 f(x) 2 0 5 1 3 4 g(x) 1 2 4 0 5 3
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05/10/21

Calculus Help (answer with explanation please)
At noon, ship A is 50 nautical miles due west of ship B. Ship A is sailing west at 16 knots and ship B is sailing north at 16 knots. How fast (in knots) is the distance between the ships changing... more
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05/09/21

give an arithmetic sequence a1=4, a10=13, find a12
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05/08/21

Find resultant magnitude and direction if a force of 14N at 66 degrees above due east and a force of 27N at 19 degrees below due west act on an object.
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05/05/21

How many solutions are there for the system of equations containing y = x – 5 and 2x – 2y = 8, and why?
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05/01/21

How many atoms are in 1.14 mol of SO3 molecules?
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