Question

What is answer of D rounded to the nearest tenth

Answer 1

In triangle EFG,
4^2+3^2=EG^2 (pyth. Theorem)
16+9=EG^2
25=EG^2
5=EG//

In triangle EGC,
EG^2+GC^2=EC^2 (pyth. Theorem)
5^2+2^2=EC^2
25+4=EC^2
29=EC^2
5.4=EC (cor. to nearest tenth)//