Help I will Give Brainliest if Correct!

Write the equation for the parabola that has x− intercepts (−2,0) and (4,0) and y− intercept (0,4).

What is the simplified form of square root of 400 to the 100th power ?

Alexandra drove from michigan to colorado to visit her friend. the speed limit on the highway is 70 miles per hour. if alexandra's combined driving time for the trip was 14 hours how many miles did alejandra drive?