12/07/15

what does the discriminant tell you about the solutions of the function?

Calculate the discriminant of f(x)=2x^2-7x+10 

area question 2

Find the area of the region between two curves below. (Hint: the answer is not 0)   y=x^3 y=x

11/15/15

Find the limit. Use l’Hospital’s Rule where appropriate. If there is a more elementary method, consider using it. If l’Hospital’s Rule doesn’t apply, explain wh

Find the limit. Use l’Hospital’s Rule where appropriate. If there is a more elementary method, consider using it. If l’Hospital’sRule doesn’t apply, explain why.   lim (x --> pi/2 +)    ... more

Calculus Differentiation

Differentiate y=(x2+1)e((-x^10)+3x)

natural logarithms

Let f(x) = ln(ln(x)). Find f' (e4)

10/28/15

Use linear approximation to estimate the number 1.999^4

Use linear approximation to estimate the number (1.999)4   That means: a = 2 f(2) = 16 f(1.999) ≈ ?     16 + 8(2)3 * .001 f(1.999) ≈ 16.064   However, this is not the right answer... more

10/27/15

Find the limit of (x --> 0+) coth(x)

lim (x --> 0+) coth(x)   I get :   2e0 + 2e-0 _________ 2e0 - 2e-0   =  4/0   But you can't have a zero in the denominator. What have I done wrong?   #23(g), p263 ANSWER:   ∞

10/22/15

At 20 °C (approximately room temperature) the average velocity of N2 molecules in air is 1050 mph

What is the total kinetic energy of 1 mol of N2 molecules moving at this speed?Express your answer using four significant figures.

10/22/15

The pH of a solution is determined to be 7.0.

The pH of a solution is determined to be 7.0. What is the hydronium ion concentration of this solution?

10/22/15

Determine the hydronium and hydroxide ion concentrations in a solution

Determine the hydronium and hydroxide ion concentrations in a solution that is 2.0 × 10-2 M NaOH.

10/21/15

How many liters...

How many liters of a 79% glycol solution must be added to 72 liters of a 34% glycol solution to get a 63% glycol solution?

10/21/15

Find equations of both lines that are tangent to the curve y = 1 + x^3

and parallel to 12x - y = 1 #55, p182

Given the function h(t)= 3t-1/2t^2-11t+5, find the domain and express your answer in set builder or interval form.

Given the function h(t)= 3t-1/2t^2-11t+5, find the domain and express your answer in set builder or interval form.

10/21/15

Differentiate : 2x * log10(x^1/2)

Differentiate : 2x * log10(√x) #21, p223

The half-life of cesium-137 is 30 years. Suppose we have a 100-mg sample.

9. The half-life of cesium-137 is 30 years. Suppose we have a 100-mg sample. (a) Find the mass that remains after years.(b) How much of the sample remains after 100 years?(c) After how long will... more

10/14/15

What is h'(0)? and What is j'(1)?

Let h(x)=g(x)sin x and j(x)=[f(x)+x^2]^3 If g(0)=9, g'(0)=-3, f'(1)=2

10/13/15

Differentiate H(u) = (u - sqrt(u)) (u + sqrt(u))

Differentiate H(u) = (u - sqrt(u)) (u + sqrt(u))

10/13/15

Find the differential of each function.

y = (2-v^2)/ (2 + v^2)

10/13/15

Find the derivative

g(x) = cosh(ln(x))

10/12/15

Find an equation of the tangent line to the curve at the given point.

y = sec x, at (3, 2)   I know I need to find the derivative obviously but I'm struggling with it

09/30/15

differentiate y=sec(0) tan(0)

Please help me 

09/29/15

find the derivative of the function f(t)= e^at sin bt

Please help me

09/24/15

h(t)=16t^2+30t

A scoop in field hockey is a pass that propels the ball from the ground into the air. Suppose a player makes a scoop with an upward velocity of 30 ft/sec. The function h(t)=16t^2+30t models the... more

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