please help me answer these questions as soon as possible please and thank you

Question 1 (1 point) Determine the exact value of the following expression: sin 30 x tan 60 + cos 30* A/ Question 2 (3 points) A species of bacteria has a population of 400 at noon. It doubles every 6 h. The function that models the growth of the population, P, at any hour, t is P(t) = 400(2) a. why is the base 2? b. determine the population at midnight. c. determine the time at which the population is 3200.( write some steps)\fQuestion 5 (1 point) Evaluate f(x) = 7 -9x for f(-3) O 6 O-20 O 20 O 34 Question 6 (1 point) The restriction(s) on the expression is/are: O -2, 1 O-2 2 O 2,-1Question 7 (1 point) /80 simplify to ? What does the expression V10 O2 10 O 2V/2 O4V2 O2V8 Question 8 (1 point) O O O\fQuestion 11 (1 point) Simplify : 15\\ 75 3v3 525 O 09 | CT 5 O 25 Question 12 (1 point) State the restrictions on the following expression: (C-3) (1+3) (C-2) (x-5) O x # 2,x # 5,x # 3,x# -3 x2x5 * *-2,x#-5 O x * -3,x # -3Question 13 (1 point) Choose the statement that best describes the parabola created by y = (x + 6)? -43 Maximum of -43 when x = 6 Minimum of -43 when x = -6 Minimum of -43 when x = 6 Maximum of -43 when x = -6 Question 14 (1 point) Determine the exact value of cos210* O O O V3 O-0.9Question 15 (1 point) The period for the graph of y = -2sin = (x - 120") + 4 is O 1080= 120= 720= 1803 Question 16 (1 point) Determine the vertex of the function: y = x - 8 + 1 O (-4, 49) O (-4, -15) O (4, 49) O ( 4,-15 )Question 17 (1 point) The point (-6,-8) is on the terminal arm of _ A. Which is the correct value of cos A? O O CT/ P Question 18 (1 point) What is the amplitude a and period of y = - 5 cos 4x? O a=5 , period 90 O a=4 , period 360" O a= 4, period 90 O a= 5, period 360"