Find the probability of the given event.A single fair die is rolled. The number on the die is greater than 2.
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem.The farther someone is from a light source, the less intense its light. The equation I = 
approximates the light intensity from light source Y and I = 
approximates the light intensity from light source Z, where d is measured in meters and I is measured in watts per square meter. Find an expression for the sum of the intensities of light from sources Y and Z.
A. 
B. 
C. 
D. 
Simplify using rational exponents.
A. 2a4b4
B. 2a3b4
C. 2a3b5
D. 2a5b2
Find the domain of the variable in the equation. Write the answer in interval notation.
= 7 + 
A. (0, ?) B. (-?, 0) ? (0, ?) C. (6, ?) D. (-?, 7) ? (7, ?)
Solve the problem.Three bacteria are placed in a petri dish. The population will double every day. The formula for the number of bacteria in the dish on day t is N(t) = 3(2)t, where t is the number of days after the three bacteria are placed in the dish. How many bacteria are in the dish seven days after the three bacteria are placed in the dish?
A. 147 bacteria B. 12 bacteria C. 384 bacteria D. 42 bacteria