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1. Determine the weight in grams of sodium dihydrogen phosphate (NaH2PO4.H2O) and disodium hydrogen phosphate (Na2HPO4) needed to prepare I L of a standard buffer at pH 7.00 with a total phosphate concentration of 0.1 M. (pKa of dihydrogen phosphate = 6.86).

What is sum of first n integers?

What is difference between pressure and stress?

What is sum of first k +ve numbers?

What would be the net force of a 12kg object accelerating at 4m/s?

The work performed as a function of time for a process is given by W = at3,
where a = 2.4 J/s3. What is the instantaneous power output at t = 3.7 s?

A boy rolls a ball at 10m/s for 2 seconds. What is the distance the ball travels?

Use factoring and the zero-product property to solve the following problems. w^2+12w+35=0

Question 3

Let  be the function with derivative . Which of the following statements is true?

Question 5

Let f  be a differentiable function with a domain of (0,5). It is known that  (x), the derivative of f(x), is negative on the intervals (0,1) and (2,3) and positive on the intervals (1,2) and (3,5). Which of the following statements is true? 

Question 6

Let f be the function with derivative . Which of the following statements is true?

Assume that the mass of a rhino is 3,100kg. Find the force of gravity where the acceleration of gravity is 9.8  

Which function is increasing over the interval (-2,1)?

1. f(x)=-x+1

2. f(x)=-x²+5

3. f(x)=x³/3+x²/2-2x

     d. f(x)=x²/2+2x+2

What is 2 x 2?

Given right triangle IJK, where IJ=5 units,

JK= units, KI=10 units. What is the value of sin(30°)?

Solve for 8x - 3 = 6x - 9

What is 10 x 10?

Find f. f ''(t) = 9/sqrt t , f(4) = 27, f '(4) = 13

f(t)=?

2. Find the approximate value of at x = 4.1 using the line tangent to its graph at x = 4.

(A)  

(B)  

(C)  

(D)  

1. For the function and . What is the approximation for f(7.8) found by using the tangent line to the graph of f at x = 8?

Find  . Be sure to show all appropriate work that properly justifies the limit technique you used.

Who invented the zero number?

a company is construing an open-top, square-based, rectangular metal tank that will have a volume of 27 cubic feet. what dimensions yield the minimum surface area?