Let 
?
Use a Riemann sum with four subintervals of equal length (
) to approximate the area of R (under the graph of f on the interval [0, 2]). Choose the representative points to be the left end points of the subintervals.
?
Repeat previous part with eight subintervals of equal length (
).
?
Compare the approximations obtained in previous parts with the exact area (4 sq units). Do the approximations improve with larger n?
?
A. 4.8 sq units; 4.4 sq units; yes
B. 4.4 sq units; 4.8 sq units; yes
C. 4.8 sq units; 4.4 sq units; no
D. 4.4 sq units; 4.8 sq units; no
Answer: A
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Solve.The amount (in g) of a radioactive substance remaining after time t (in months) is given by the function 
. Express 
in polynomial form by using the first three terms of the Maclauren expansion.
A. 320 - 6.4t + 0.064t2 + . . . B. 320 + 6.4t + 0.064t2 + . . . C. 320 - 320t + 160t2 + . . . D. 320 - 6.4t + 0.128t2 + . . .
Find the equation of a line passing through the given points. Solve the equation for y.(5, 6); slope = 
A. y = - 
x + 2
B. y = 
x - 2
C. y = - 
x - 2
D. y = 
x + 2
Two marbles are drawn without replacement from a box with 3 white, 2 green, 2 red, and 1 blue marble. Find the probability.The second marble is blue given the first marble is white.
A. 
B. 
C. 
D. 
Solve.Find 56 subtracted from 74.
A. 18 B. 28 C. 10 D. 130