Answer the problem with a sentence containing the requested measurement.A pebble on the beach weighs 191 decigrams. Express this number in milligrams.
A. A pebble on the beach weighs 1910 milligrams.
B. A pebble on the beach weighs 19,100 milligrams.
C. A pebble on the beach weighs 1.91 milligrams.
D. A pebble on the beach weighs 19.1 milligrams.
Answer: B
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Solve the problem. POLLUTION 
Years since 1980Use the ordered pairs (2, 14.78), (6, 11.82), and (8, 13.58) to find a quadratic function that models the data. Round the values of a, b, and c to two decimal places.
A. y = -2.90x2 + 0.27x + 20.5 B. y = 0.27x2 - 2.90x + 19.50 C. y = 2.9x2 - 0.27x + 19.50 D. y = -2.90x2 + 0.27x + 19.50
You are given function f defined on an interval [a, b], the number n of subintervals of equal length 
, and the evaluation points ck in 
(a) Sketch the graph of f and the rectangles associated with the Riemann sum for f on [a, b], and (b) find the Riemann sum. f(x) = 2x ? 3, [0, 2], n = 4, ck is the right endpoint
Find the center of the hyperbola.
- 
= 1
A. (-4, 6) B. (-6, 4) C. (8, -4) D. (6, -4)
Solve the problem.Rachel's bus leaves at 4:10 PM and accelerates at the rate of 3 meters per second per second. Rachel, who can run 6 meters per second, arrives at the bus station 3 seconds after the bus has left. Find parametric equations that describe the motions of the bus and Rachel as a function of time, and simulate the motion of the bus and Rachel by simultaneously graphing these equations.
A. Bus: x1 = t2, y1 = 2;
Rachel: x2 = 6(t + 3), y2 = 4
B. Bus: x1 = t2, y1 = 2;
Rachel: x2 = 6(t - 3), y2 = 4
C. Bus: x1 = 3t2, y1 = 2;
Rachel: x2 = 6(t - 3), y2 = 4
D. Bus: x1 = 3t2, y1 = 2;
Rachel: x2 = (t - 3), y2 = 4
