Write the number in scientific notation.420,000
A. 4.2 x 105
B. 4.2 x 10-6
C. 4.2 x 10-5
D. 4.2 x 106
Answer: A
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Convert.77.5 hectograms to kilograms
A. 7750 kg B. 0.775 kg C. 77.5 kg D. 7.75 kg
Graph the parabola.x = (y + 5)2 + 7
A. 
B. 
C. 
D. 
Solve the triangle using the labels as shown in the illustration (round lengths of sides to three significant digits and angles to the nearest tenth of a degree).
°, a = 38.3 mi, c = 28.5 mi
A. b = 38.3 mi, 
°, 
°
B. b = 45.8 mi, 
°, 
°
C. b = 38.3 mi, 
°, 
°
D. b = 45.8 mi, 
°, 
°
E. b = 45.8 mi, 
°, 
°
Determine where the function is increasing and where it is decreasing.f(x) = -x2 + 2x + 8
A. increasing on (-?, 1) decreasing on (1, ?) B. increasing on (1, ?) decreasing on (-?, 1) C. increasing on (-?, 9) decreasing on (9, ?) D. increasing on (9, ?) decreasing on (-?, 9)