Simplify using order of operations.-7 + 6(5 - 9)
A. 4
B. 31
C. -4
D. -31
Answer: D
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Provide an appropriate response.The current population of a threatened animal species is 1 million, but it is declining with a half-life of 
How many animals will be left in 80 years?
A. 22,965 animals B. 46 animals C. 45,929 animals D. 230 animals
Solve the problem.The strength S of a wooden beam with rectangular cross section is given by the formula S = kd3 sin2 ? cos ?where d is the diagonal length, ? the angle illustrated, and k is a constant that varies with the type of wood used. 
Let d = 1 and express the strength S in terms of the constant k for ? = 45°, 50°, 55°, 
and 65°. Does the strength always increase as ? gets larger?
What will be an ideal response?
Determine the most appropriate metric unit to go in the blank. Choose from L, mL, kg, g, and mg.Helen and Juan went hiking. Between the two of them they brought 8 
of water.
A. mg B. mL C. kg D. g E. L
Combine the following, if possible.
+ 
+ 
+ 12
A. 17
+ 11
B. 145
+ 241
C. 17
+ 55
D. 72