Which is an exponential decay function? f(x) = 3/4 (7/4)x f(x) = 2/3 (4/5)–x f(x) = 3/2 (8/7)–x f(x) = 1/3 (9/2)x

Me! i really need to get this right before 9. prove the divisibility of 7^6+7^5-7^4 by 11. use factoring so you get a number times 11. just tell me the number. i need this done asap

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

Is there a direction u in which the rate of change of f(x, y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.