Solve the problem.The half-life of a certain radioactive substance is 22 years. Suppose that at time 
there are 21 g of the substance. Then after t years, the number of grams of the substance remaining will be: N(t) = 21
t/44How many grams of the substance will remain after 242 years? Round to the nearest hundredth when necessary.
A. 0.23 g
B. 0.46 g
C. 0.12 g
D. 0.06 g
Answer: B
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Use divisibility rules to determine whether the given number is divisible by 2, 3, 5, or any combination of these.33,010
A. 2, 3 B. 2, 5 C. 5 D. 2
Identify the degree and leading coefficient of the polynomial.f(x) = -9x6 - 4x5 - 2x4
A. Degree: 15; leading coefficient: -9 B. Degree: 6; leading coefficient: -9 C. Degree: -9; leading coefficient: 6 D. Degree: 4; leading coefficient: -9
Find the volume of the geometric solid. If needed, use 3.14 as an approximation for ? and round the answer to the nearest tenth.Circular cylinder with radius 9 mm and height 19 mm
A. 4832.5 mm3 B. 1073.9 mm3 C. 9664.9 mm3 D. 536.9 mm3
Find fractional notation for the ratio. You need not simplify.4.6 to 13
A. 
B. 
C. 
D. 