Step-by-step explanation:
0.9(17) -2.7(3) =
15.3-8.1
=7.2
The expected value of the inseam length of the jeans is found as
30% of 30+ 25% of 32+ 10% of 34+ 10% of 36 + 10% of 38 + 15% of 40
= 
= 
Hence, the third option 33.8 is the correct expected value.
The image is blurry
Step-by-step explanation:
I pretty sure the best answer would be f(x)=cbrt(27-x)
cbrt means cube root by the way.