The tunnel is 480 miles .if 2 represents 60 what is the legemth of the tunnel?

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

#1-20 state whether the angles are alternate interior, alternate exterior, vertical, or corresponding angles.

Which of the following parabolas opens down?