Tell whether or not the relation is a function.{(-3,1), (-2,-5), (3,-2), (3,8)}
A. Yes
B. No
Answer: B
Mathematics
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Solve the problem.Suppose that the amount in grams of a radioactive substance present at time t (in years) is given by A(t) = 670e-0.81t. Find the rate of change of the quantity present at the time when 
A. 5 grams per year B. -5 grams per year C. -107.4 grams per year D. 107.4 grams per year
Mathematics
Write the expression in terms of sine and cosine, and simplify so that no quotients appear in the final expression.csc x(sin x + cos x)
A. sec x csc x B. -2 tan2 x C. sin x tan x D. 1 + cot x
Mathematics
Estimate the sum or difference by first rounding each number to the nearest hundred.899.15 + 359.834 + 449
A. 1700 B. 1500 C. 1800 D. 1600
Mathematics
Simplify. Assume that all variables represent positive real numbers.
A. 7xy
)
B. 7xy
C. 5xy
)
D. 7xy
Mathematics