Elise and Suzanne are designing a quilt and want to use a different symmetries of shapes. Elise claims that they can use a shape that has exactly three rotational symmetries (less than 360°) and four unique reflectional symmetries. To convince Suzanne, Elise draws out the shape and illustrates the symmetries?

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:

step-by-step explanation:

why? because i noticed a pattern. 60 120. those numbers without the zero, make the 6 times tables leaving your answer to be b since 6 times 4 is 24 and adding a zero making it 240.

answer is b.

15

i got this one as well.