Solve the problem.A certain radioactive isotope has a half-life of approximately 1550 years. How many years to the nearest year would be required for a given amount of this isotope to decay to 25% of that amount?
A. 3075 years
B. 643 years
C. 1163 years
D. 3100 years
Answer: D
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A radioactive substance is decaying at a constant yearly percentage rate of 6%. The initial amount is 444 grams. How much will remain after 13 years? Round your answer to two decimal places if necessary. ?
A. 100.68 grams B. 198.63 grams C. 199.7 grams D. 97.68 grams
LetU = {q, r, s, t, u, v, w, x, y, z} A = {q, s, u, w, y} B = {q, s, y, z} C = {v, w, x, y, z}. List the elements in the set.A - C
A. {q, s, u, v, x, z} B. {q, s, u} C. {w, y} D. {v, x, z}
Perform the indicated operations. Write the result using only positive exponents. Assume all variables represent nonzero real numbers.
A. 
B. x12
C. 
D. -x16
Graph the function defined by a radical expression. Give the domain and range.y = -2 
A. Domain: [2, ?);
Range: [0, ?)
B. Domain: [-2, ?);
Range: [0, ?)
C. Domain: [-2, ?);
Range: (-?, 0]
D. Domain: [2, ?);
Range: (-?, 0]