Convert the given number to scientific notation.7,800,000
A. 7.8 × 107
B. 7.8 × 10-7
C. 7.8 × 106
D. 7.8 × 10-6
Answer: C
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Find the mass of the wire that lies along the curve r and has density ?.C1: r(t) = (6 cos t)i + (6 sin t)j, 0 ? t ? 
;C2: r(t) = 6j + tk, 0 ? t ? 1; ? = 3t3
A. 
units
B. 
?3 units
C. 
units
D. 3?3 units
Graph the function by starting with the graph of the basic function and then using the techniques of shifting, compressing, stretching, and/or reflecting.f(x) = (-x)2
A. 
B. 
C. 
D. 
A plane flying horizontally at an altitude of 1 mi and a speed of 550 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station.
a. ? 476 mi/h b. ? 670 mi/h c. ? 455 mi/h d. ? 570 mi/h e. ? 495 mi/h
Use the given matrices to compute the given expression.Let A = 
and B = 
. Find 2A + 3B.
A. 
B. 
C. 
D. 