Find $F _ { 10 } \text { where } v _ { 1 } = 20 \text { and } v _ { 2 } = 40 \text {. }$

Find $F _ { 10 } \text { where } v _ { 1 } = 20 \text { and } v _ { 2 } = 40 \text {. }$

A) 1.61
B) 1.99
C) 1.84
D) 1.71