Solve the problem.A cross-country skier reaches the 13-km mark of a race 40 min after reaching the 
mark. Find the speed (average rate of change) of the skier.
A. 8 km/hr
B. 32 km/hr
C. 
km/hr
D. 12 km/hr
Answer: D
Mathematics
You might also like to view...
Find the value of df-1/dx at x = f(a).f(x) = x2 - 4x + 9; a = 4
A. 
B. 
C. 4
D. 
Mathematics
Find the perimeter (P) of each figure.
A. 56 mi B. 182 mi C. 69 mi D. 67 mi
Mathematics
Solve.A multiple birth is any birth with 2 or more children born. The birth rate is the number of births per 1000 women. In one country, the birth rate B of multiple births as a function of age a is given by the function 
for 
What is the domain of the linear function?
A. (15, 47) B. [15, 47] C. [2, ?) D. [15, ?)
Mathematics
Identify the inequality as true or false.-8 > -8
A. True B. False
Mathematics