The inverse variation equation shows the relationship between wavelength in meters, x, and frequency, y.
y =3x10^8/x
What are the wavelengths for X-rays with frequency 3 x 10^18?

1. 1x10^-10m
2. 3x10^-10m
3. 3x10^26m
4. 9x10^26m

Paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each? 1. define a variable for the situation. 2. write an inequality that represents her profit. note: revenue is money coming in. cost is money going out. profit is the difference between the revenue and the cost. in other words: revenue - costs profit 3.using words, describe how many windows she must sell to have a profit of at least $48,000.