Multiply.(
- s)(
+ s)
A. a - s
B. a - 2s
- s2
C. a - s2
D. a + 2s
- s2
Answer: C
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Solve the problem.In the formula A = Iekt, A is the amount of radioactive material remaining from an initial amount I at a given time t and k is a negative constant determined by the nature of the material. A certain radioactive isotope has a half-life of approximately 1200 years. How many years would be required for a given amount of this isotope to decay to 70% of that amount?
A. 360 yr B. 2084 yr C. 547 yr D. 617 yr
The question(s) that follow refer to the problem of finding the minimum spanning tree for the weighted network shown below.
Using Kruskal's algorithm, which edge should we choose last?
A. BC B. AB C. AC D. CD E. none of these
Convert from cents to dollars.325¢
A. $3.25 B. $3250.00 C. $0.325 D. $32.50
Solve the problem.A geometric progression is a sequence of terms in which each term is r times the preceding term. The sum of the first two terms of such a sequence, where a is the first term, is given by the expression 
. Simplify the expression.
A. a(1 - r) B. a(1 + r2) C. a + r D. a(1 + r)