<span>The correct
answer is 3.24 grams per cubic centimetre. As a matter of fact, the
lunar soil’s mean density may range from 2.90 to 3.24 g cm-3 which highly
depends on the type of ingredients present in its resource materials.</span>
2% = 2/100 = 1/50
20% = 20/100 = 1/5
85% = 85/100 = 17/20
4% = 4/100 = 1/25
Answer:
The roots are


Step-by-step explanation:
we have

so
Group terms that contain the same variable, and move the constant to the opposite side of the equation


Factor the leading coefficient

Complete the square. Remember to balance the equation by adding the same constants to each side



Rewrite as perfect squares

square root both sides



Pi×radius squared
Pi=3.14
radius squared= radius×radius