10,11 &12 please

. [0/1 Points] DETAILS PREVIOUS ANSWERS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A population of 460 bacteria is introduced into a culture and grows in number according to the equation below, where t is measured in hours. Find the rate at which the population is growing (in bacteria/hour) when t = 4. (Round your answer to two decimal places.) P (t ) = 460 1+ - 5t 20 + + 2 P'(4) = 5.09 x bacteria/hour Need Help? Read It Watch It Submit Answer 11. [0/1 Points] DETAILS PREVIOUS ANSWERS MY NOTES ASK YOUR TEACHER Find the second derivative of the function. f(x) = sec(x) f" (x) = sec(x) tan(x) X Need Help? Read It Submit Answer 12. [-/1 Points] DETAILS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Find the given higher-order derivative. F ( 3 ) ( x ) = 1 X 3 , F ( 4 ) ( x ) F ( 4 ) ( x ) = Need Help? Read It Watch It