If a circle has a diameter of 30 meters, which expression gives its area in square meters?

A 15•pie
B. 30²•pie
C. 30•pie
D. 15²•pie

29933333.33

step-by-step explanation:

it would open into a square depending on the type of envelope i’m not sure about the second part

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: