How to subtract 'multiplicative identity for integers' from 'additive identity for integers'

In trapezoid efgh, m∠gfe=63∘. identify m∠ghe. !

Which is the standard form for this number? (4 x 1 100 ) + (8 x 1 1,000 ) + ( 3 x 1 100,000 ) ? a) 0.004803 b) 0.04803 c) 0.0483 d) 0.483

Is there an x intercept in the equation 60*1.15^x