Solve the problem.A cross-country skier reaches the 12-km mark of a race 40 min after reaching the 
mark. Find the average rate of change in the speed of the skier.
A. 9 km/hour
B. 
km/hour
C. 
km/hour
D. 18 km/hour
Answer: C
Mathematics
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Convert the other base number to base 10.230115
A. 3465 B. 496 C. 7426 D. 346
Mathematics
Find the measure of the dihedral angle indicated.The figure shown is a right prism whose bases are regular triangles. Find the measure of the dihedral angle between each lateral face and a base.
A. 60° B. 90° C. 45° D. 120°
Mathematics
Solve.Find the volume of a rectangular box 8 inches by 5 inches by 3 inches.
A. 200 cu in. B. 45 cu in. C. 192 cu in. D. 120 cu in.
Mathematics
Solve the problem. Round to the nearest unit.5
% of what is 57?
A. 1,036 B. 10,360 C. 3 D. 104
Mathematics