Given sin x=13/85 and tan x=13/84 . What is the ratio for cos x?

Enter your answer in the boxes in the simplest form.

40 points

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

Aflower has 26 chromosomes. to create a new flower,how many would a sperm cell have what is called?