Question

Check these answers please... include explanations whenever possible and evaluate each answer & the work. If i get something wrong, give an explanation for it and the correct answer. (questions in attachment)

Answer 1

The first one is 17.7 after rounding off
a2+b2=c2
b2=19^2-7^2
b=17.664
The second one is 108
Volume of a prism=base area x length
=(1/2 x12.6x1.6) x 10.75
=108.36mm3