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

11/27/15

#### area question 2

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

#### 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

#### natural logarithms

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

#### 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

#### 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?

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

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

10/21/15

#### 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

#### You'reRidingAnElevatorHoldingASpringScaleW/A1kgMassSuspendedFromIt.ThenScaleReads9.3N.WhatIsAccelerationOnElevator?

Physics Question

10/21/15

#### A block has a mass of 1.2kg and a sphere has a mass of 3.0kg. What are the readings of the two scales? (Neglect the masses of the scales)

Physics question

#### 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

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

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

#### 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

09/24/15

#### 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

## Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.

Most questions answered within 4 hours.

#### OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.