Which table shows a proportional relationship between x and y? A
B
С
D
X
y
X
y
у
x
у
3
6
9
12.
15
4
10
16
22
28
12
14
16
18
20
6
12
18
24
30
4
8
12
16
20
2
4
8
14
20
5
10
15
20
25
1
2.
3
4
5
А
В

triangle abc is reflected on the line x=-6.5 then reflected again on the x axis

step-by-step explanation:

too hard the other guy did it

step-by-step explanation:

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:

the answer is b.

64

step-by-step explanation:

c=2πr=2·π·8≈64