If 2+2+2+2 is 8 why is 4x2=8

Someone answer asap for ! a ball is rolled down a ramp. the height, f(x), in meters, of the ball x seconds after it is released is modeled by the function f(x) = x²- 10x + 25 for all values of x from 0 to 5. which statement about the ball is true? a. the maximum height of the ball is 5 meters b. the height of the ball increases from 0 to 5 meters above the ground. c. the ball has traveled 5 meters when it reaches the bottom of the ramp. d. the ball has been traveling for 5 seconds when it reaches the bottom of the ramp

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer

How would you find the height of points on the circle? the topic is trigonometry.