Answer:
See below.
Step-by-step explanation:
1) Please check the number of volume of steel. It should be 54,259.2

. Not 54,259.2 cm. Right?
2) If so,
First
The volume of single rod

The number of rods

Answer:
10√3 / 3
Step-by-step explanation:
cos 30 = 5 / x
x = 5 / cos 30
= 5 / √3 / 2
= 10 √3
= 10√3 / 3
The total would be $2.73.
Answer:
- 8p - 80
Step-by-step explanation:
Given
4(- 15 - 3p) - 4(- p + 5) ← distribute both parenthesis
= - 60 - 12p + 4p - 20 ← collect like terms
= - 8p - 80