After 3 hours, Ernie had traveled 195 miles. If he travels at a constant speed, what was Ernie's speed in miles per hour?

65 mph

Step-by-step explanation:

195÷3=65. you take your miles total and divide them by your tim total

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: