Given cos? = 0.7801. Use a calculator to find ? to the nearest tenth.
a. ? = 38°
b. ? = 38.7°
c. ? = 51.3°
d. ? = 0.7°
e. ? = 0.9°
b. ? = 38.7°
Mathematics
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Solve the system by graphing.-3 = 3x - yy = 3x
A. (0, -3) B. (-3, 0) C. No solution D. Infinitely many solutions
Mathematics
Solve the problem.At time t ? 0, the velocity of a body moving along the s-axis is 
When is the body's velocity increasing?
A. t < 4 B. t > 2.5 C. t < 2.5 D. t > 4
Mathematics
Use the laws of exponents to simplify each expression using positive exponents only. Assume all variables represent nonzero real numbers.-3y0
A. 1 B. 0 C. -2 D. -3
Mathematics
Perform the indicated operation. Simplify, if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics