09/23/15

#### The molar mass of aspirin is 180.16 g/mol. What is the theoretical yield in grams, for the aspirin she theoretically obtained above using 4.02 g of SA?

The molar mass of aspirin is 180.16 g/mol. What is the theoretical yield in grams, for the aspirin she theoretically obtained above using 4.02 g of SA? What is the percent yield?

#### The slope of the tangent line to the curve y=3 vx

The slope of the tangent line to the curve y=3 √x at the point (8, 8.4853) is  m=? The equation of the tangent line can be written in the form y = mx+b where m=? and b=?

09/21/15

#### Find the horizontal limit(s) of the following function: f(x)= (9x^3-8x^2-8x)/(7-8x-7x^3)

Find the horizontal limit(s) of the following function:   f(x)= (9x^3-8x^2-8x)/(7-8x-7x^3)   I know that one of the horizontal limits is the -9/7, but I'm still missing one and can't find it,... more

#### What value for f(0) would make f(x) continuous at x=0

5/x + (-4x+5)/x(x-1) if x≠0,1 Let f(x)=   7   if x=0   What value for f(0) would make f(x) continuous at x=0 Must redefine f(0)=?   Please list all steps... plzzz!!!

09/13/15

#### Help! Calculus question

In 1960 there were 238,950 immigrants admitted to a country. In 2009 the number was 1,073,319. Write an equation expressing immigrants y, in terms of t, the number of years after 1900

09/07/15

#### limits. with fractions in the numerator

lim x→0    (1/4)-(1/(x+4))         x   Step 1 would be to get common denominators on the top so....        (1/4)  - (1/(x+4))   =     1   -  1      = 1 (x+4)    -  1(4)         x            x... more

05/27/15

#### General solution of differential equation?

What is the general solution of (2+x)y'=3y? I've gotten to e^((1/3)lny) = e^(ln(2+x)+c) , but I don't know how to simplify it further.

04/29/15

#### If there are 24 students in the class, how many different groups are possible?

A teacher divides his class into new groups of 4 students each week.

03/03/15

#### money problem

mensewar orderded short sleeve shirts for 23.00 each and long sleeve shirts for 28.50 each from Hugo boss. if the total amounted to 9,862.50 for 375 shirts how many of each were ordered

03/03/15

02/12/15

#### Find the value of (f o f^-1) (5)

Find the inversion of each function. Is the inverse a function?

02/04/15

#### Using the definition of a derivative find:

y=x3-5x+1   (a)Find y'(1) using the denition of the derivative (i.e. the limit of a differencequotient).(b)Write the equation of the tangent line at x= 1

02/04/15

#### How many grams?

the half life of radium is 1690 years. If 50 grams are present now, how much will be present in 270 years?

02/04/15

#### Clearing decimals

-2.3x - 1.276 = 6.728

02/04/15

#### Which function's graph has asymptotes located at the values

Which function's graph has asymptotes located at the values x=+/- n(pi)   1.) y=cscx 2) y=cosx 3)y=tanx 4)y=cotx     a) 1 only B) 2 only c) 1 and 3 only d) 1 and 4 only

02/04/15

#### how to find the minimum and maximum value of 4(x-2)/(4x^2 +9)

how to find the minimum and maximum value of y = 4(x-2)/(4x2 +9)

02/01/15

#### world problem

A circus juggler throws a ball upward with an initial velocity of 15.8 m/s. How long does he have before it comes back down and he has to catch it? Assume he catches it at the same height from... more

02/01/15

#### Average speeds

An automobile averaged 40 mph for part of a trip and 50 mph for the remainder. If the 5-hour trip covered 210 miles, for how long did the car average 40 mph?

02/01/15

#### Factor: 3x^2+7x+2

I do not know how to factor this into a trinomial

#### Related Rates

A television camera is positioned 4000ft from the base of a rocket launching pad. The angle of elevation of the camera has to change at the correct rate in order to keep the rocket in sight. Also,... more

#### Linear function

The manufacturing process requires that oil refineries manufacture at least 2 gallons of gasoline for each gallon of fuel oil. To meet the demand for fuel oil, at least 3 million gallons per day... more

01/26/15

#### area between curves

find the area between y=0 and y=3(x3-x)

01/26/15

#### Standard form of the equation of a line

write Y= -2X + 9 using the standard form of the equation of a line.

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