First, we determine the volumes of the posts may it be cylindrical in shape or rectangular prism.

(A) cylindrical:
( π(26.7/100)² - π(24.2/100)²)*(7.5) = 0.3 m³
(B) rectangular prism:
(40/100)²(7.5) - (35/100)²(7.5) = 0.28125 m³

Then, we calculate for the amount of substance
(A) cylindrical: (0.3 m³)(2700 kg/m³) = 810 kg
(B) rectangular prism : (0.28125 m³)(2700 kg/m³) = 759.375 kg

Then, calculate for the costs
(A) (810 kg)($0.38/kg) = $307.8
(B) (759.375 kg)($0.38/kg) = $288.56

Thus, the answer for A is rectangular post
B. About $19.24 can be saved.

6 0

3 years ago

PLZ HELP

belka [17]

Answer:

425261625

Step-by-step explanation:

1+2-4252+425251-34%+5%

4 0

3 years ago

if i I wanted to be precise, how can I express the exact circumference for the circumference given the diameter

sveticcg [70]

The formula for circumference is $\pi d$ .

To express the circumference exactly, plug the diameter in for $d$ and put the $\pi$ symbol in front of it. Don't multiply. This expresses the exact circumference.

Say you have the diameter of 17.
You can express the circumference with 17 $\pi$ .

6 0

3 years ago

Write the inequality that represents the​ sentence, ​"Four less than a number is greater than 58​."​

Write the inequality that represents the sentence, "Four less than a number is greater than 58."