Points c, a and b are collinear which if the following options is another name for ca

Factorize: x^2+8x+10 i just solved it but i don't know if the process is correct

The highest point on earth is the peak of mount everest if you climb to the top you would be approximately 29,035 feet above sea level at remembering that amount is 5280 feet percentage of the height of the mountain would you have to climb to reach a point 2 miles above sea level

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?