Solve the problem.A research study tested for the presence of a certain environment-sensitive chemical in the sap of trees within a particular geographical region. The formula P = 
models the percentage, P, of trees that tested positive for the chemical t years after 1875. Use this model to find the percentage of trees that tested positive in 1883.
A. 
%
B. 11%
C. 
%
D. 
%
Answer: B
Mathematics
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Use the definition to find an expression for the instantaneous velocity of an object moving with rectilinear motion according to the given function relating s (in ft) and t (in s).s = 3t4 - 7t3 + 3
A. 12t3 - 21t2 + 3 B. 3t3 - 7t2 C. 12t3 - 21t2 D. 3t3 - 7t2 + 3
Mathematics
Provide an appropriate response. If you receive a paycheck for $375 and pay out $265 in bills, what do you have left?
A. $110 B. $325 C. $101 D. $120
Mathematics
Factor.x2 + 3x - 10
A. (x + 5)(x + 2) B. (x - 5)(x + 2) C. (x + 5)(x - 2) D. (x - 5)(x - 2)
Mathematics
Simplify the expression. Assume that all variables are positive when they appear.
A. 
B. 23
C. 
D. 23
Mathematics