Why is it that when I try to change my password and email on here that is says that my password is incorrect, but really it's not?!

Light travels at a speed of 186,000 miles a second. the distance light travels in a year is 5,865,690,000,000 miles/year 5,865,695,000,000 miles/year 58,656,950,000,000 miles/year 6,789,000,0000 miles/year

Whats three fourths of 15(this is supposed to be in math but i clicked too fast)

Telling a computer that is already on to turn again is known as what type of boot?