A keycode must contain 2 letters followed by 3 numbers. The letters may be
any letter of the alphabet The numbers should be any number from 0 to 9.
How many different keycode combinations are there?

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.