Question in the picture

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)