Solve the problem.Find the value for x in the following special right triangle. Use exact values. 
4 in.
A. 16 in.
B. 2 in.
C. 4
in.
D. 4 in.
Answer: C
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Provide an appropriate response.Increasing the initial speed of a projectile by a factor of 9 increases its range by what factor? Assume the elevation is the same.
A. Factor of 9 B. Factor of 3 C. The elevation must be specified before an answer can be found. D. Factor of 81
Solve the system of equations.x + 5y + 5z = -8 4y + 5z = -3 z = 1
A. x = -3, y = 1, z = -2 B. x = -3, y = -2, z = 1 C. x = 1, y = -2, z = -3 D. Inconsistent
Solve the problem.In the formula N = Iekt, N is the number of items in terms of an initial population I at a given time t and k is a growth constant equal to the percent of growth per unit time. There are currently 63 million cars in a certain country, increasing by 5.1% annually. How many years will it take for this country to have 86 million cars? Round to the nearest year.
A. 5 years B. 3 years C. 61 years D. 6 years
Provide an appropriate response.Write 
as a whole or mixed number.
A. 
B. 
C. 
D. 