function p38( t ) {
	return 0.87254084284461718231e-1 + (0.17999608886001962327e-2 + (0.13344443080089492218e-4 + (0.90900994316429008631e-7 + (0.56486134972616465316e-9 + (0.31698707080033956934e-11 + 0.15825697795555555556e-13 * t) * t) * t) * t) * t) * t;
}
Chebyshev polynomial for \[0.38, 0.39).

@private
@param {number} t - scaled value
@returns {number} result