Determine the half-life of the substance that decays from A0 to A in time t. Round to the nearest tenth of a unit. A0 = 162, A = 60, t = 17 years
A. 2.5 yrs
B. 17.1 yrs
C. 11.9 yrs
D. 11.7 yrs
Answer: C
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Solve the problem.Two forces, F1 of magnitude 35 newtons (N) and F2 of magnitude 55 newtons, act on an object at angles of 
and 
(respectively) with the positive x-axis. Find the direction and magnitude of the resultant force; that is, find 
Round the direction and magnitude to two decimal places.
What will be an ideal response?
Find the exact value of the indicated trigonometric function of ?.sin ? = - 
, tan ? > 0Find sec ?.
A. - 
B. - 
C. - 
D. 
Write the rational expression in lowest terms.
A. x - 2 B. x - 4 C. x + 2 D. x + 4
Provide an appropriate response.Can you find the sum of the infinite geometric series 2 + 6 + 18 + . . . ? Why or Why not?
A. Yes. This is a geometric series. B. No. This is not a geometric series. C. No. The common ratio, r, is greater than 1. D. Yes. The common ratio, r, is less than 1.