Use the Gauss-Jordan method to find A-1, if it exists.A = 
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.Use the formula N = Iekt, where N is the number of items in terms of the initial population I, at time t, and k is the growth constant equal to the percent of growth per unit of time. A certain radioactive isotope decays at a rate of 0.2% annually. Determine the half-life of this isotope, to the nearest year.
A. 347 years B. 3 years C. 250 years D. 151 years
A car accelerates in a westerly direction from a yield sign to a constant speed on the freeway. It then exits the freeway and parks. Measure the location of the car as its distance west of the yield sign. Make a graph of velocity. Be sure to label you graph appropriately. ? ? ? ? .
What will be an ideal response?
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A. 15
B. 93
C. 23
D. 18
and 
, what is the value of w when
Solve. Round all dollar amounts to the nearest cent, if necessary.A tax of $2674 is added to a bulk order's price of $38,200. Find the sales tax rate.
A. 14.3% B. 1.4% C. 0.7% D. 7%