PLS DO #2 I WILL GIVE BRAINLIEST

180 ft²

Step-by-step explanation:

The figure is composed of 2 triangles and a rectangle between them

Calculate area of triangle on left

A = bh ( b is the base and h the perpendicular height ), thus

A = × 9 × 6 = 4.5 × 6 = 27 ft²

Area of rectangle = 12 × 9 = 108 ft²

Calculate the area of the triangle on the right

A = × 9 × 10 = 4.5 × 10 = 45 ft²

area of composite figure = 27 + 108 + 45 = 180 ft²

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:

i believe it's a.

i'm not sure on this one, most likely correct.