Solve the problem.A sample of 650 grams of radioactive substance decays according to the function 
where t is the time in years. How much of the substance will be left in the sample after 30 years? Round to the nearest whole gram.
A. 0 g
B. 298 g
C. 1 g
D. 341 g
Answer: B
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Solve the problem.A company produces three sizes of a dog house; small, medium, and large. The small dog house sells for $80, the medium size for $110, and the large for $140. The small dog houses cost $52 each to make, medium $62 each, and large $81 each. Let s represent the number of small size dog houses, m represent the number of medium size dog houses and ? represent represent the number of large size dog houses. Write an expression in simplest form for net.
A. 28s + 48m + 59? B. -28s - 48m - 59? C. -26s - 51m - 74? D. 26s + 51m + 74?
Solve the problem.A worker has readings that take 
minute each to read and record. How many readings can be completed in 54 minutes?
A. 18 readings B. 36 readings C. 81 readings D. 20 readings
Solve the inequality.log2 (4x + 2) ? 2
A. x ? - 
B. x ? 
C. x ? 
D. x ? 
Solve the equation.2x2 - 3= 64
A. {6}
B. {3}
C. {3, -3}
D. {
, - 
}