# 9,10 and N.R 4,5

4. The largest non-permissible value of x for the equation - 6 x+3 x - 1 = 2 is 9. The domain and range of the function P(r ) = 500(0.7) are A. Domain: {r | r E R} and Range: {P(r) | P(r) E R} B. Domain: {r | r E R } and Range: {P(r) | P(r) > 0, P(r) E R} C. Domain: {r | r E R} and Range: {P(r) | P(r) 2 0, P(r) E R} D. Domain: {r | r > 0, r E R} and Range: {P(r) | P(r) > 0, P(r) E R} 10. A strain of bacteria is reduced by 30% every 40 minutes when an antibiotic is administered. If A is the initial number of bacteria present, and A( t ) represents the number of bacteria remaining at time t minutes, then an equation modelling this situation is A. . A(t ) = A (0.3) 401 B. A(t ) = A (0.3) 40 C. A(t ) = A (0.7) 40' D. A(t) = A (0.7) 40 Numerical Response 5. Given cos 0 = - 0.766 0, where 90