Currency, such as a dollar can not be a percent. Do you mean 76.186?
All faces are rectangles.
Each two opposite faces are congruent and have the same area.
Two faces measure 20 cm by 7 cm.
Two faces measure 20 cm by 15 cm.
Two faces measure 15 cm by 7 cm.
total surface area = 2 * 20 cm * 7 cm + 2 * 20 cm * 15 cm + 2 * 15 cm * 7 cm
total surface area = 280 cm^2 + 600 cm^2 + 210 cm^2
total surface area = 1090 cm^2
The remaining amount after 4 years is 1.25 kg
<h3>How to determine the remaining amount?</h3>
The half life of a function is represented as:

Where
Ao represents the initial amount
So, we have:

In 4 years, t = 4.
So, we have:

This gives

Evaluate the expression
A = 1.25
Hence, the remaining amount after 4 years is 1.25 kg
Read more about half life at:brainly.com/question/26148784
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The associative property is the answer
Answer:
D. 100°
Step-by-step explanation:
A straight line is 180°. Add 50° and 30° (which is 80°) and subtract the total from 180°.
50 + 30 = 80
180 - 80 = 100