10. the equation t=0.07c represents tax, t , based on the cost, c, of an item. which part of the equation represents the constant of proportionality?

a. t
b. 0.07
c. c
d. 7

32/80  

91/140

the last one 54 doesn't go into 45. 54/100 ?

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:

step-by-step explanation: