Stephen wants to place an order on Amazon. He wants to order DVD’s, x, that cost $3 each. Shipping for his entire order costs $7 flat. Stephen wants to spend less than $100.?

7

step-by-step explanation:

the answer would be 7

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is:

answer: i believe it is c

step-by-step explanation:

because 5+4=9 so it would be 3^9