Step-by-step explanation:
3(3u-5)=39
9u - 15 = 39
9u = 15 + 39
9u = 54
divide both by 9
u = 54/9
u = 6
I think it’s 4 m because diameter is 2r
The nearest tenth would be the first decimal place, so the answer would be 23.8
Answer:
Volume= 216 cubic yards
Surface area: 276 square yards
Step-by-step explanation:
Find volume of rectangular prism:
V= lxwxh
V= 3x18x4
= 216 cubic yards
Find surface area:
SA= 2 x (front/back area) + 2 x (right/left area) and 2 x ( bottom/top area)
Front and Back Area:
A= l x w
A = 18 x 3
= 54 square yards
Right/ left Area:
4 x 3
= 12 square yards
Top/ Bottom Area:
18 x 4
= 72 square yards
54^2+12^2+72^2
= 108+24+144
=276 square yards