Add 1.5 to both sides:

Divide both sides by 2:

Consider the arcsin of both sides:

Arcsin and sin simplify, because they are inverse of each other:

250*300= 75000 sq. ft
75000 sq. ft * $5 = $375000
350*400= 140000
140000 sq. ft * $5= $700000
375000+700000= $1075000
0.0006=6x10^-4
Since the exponent is negative, the number will get smaller. A negative exponent shows that the decimal point is shifted that number of places to the left. The exponent is -4, so the decimal place will move 4 places to the left.