Answer:The general equation of a sphere is: (x - a)² + (y - b)² + (z - c)² = r², where (a, b, c) represents the center of the sphere, r represents the radius, and x, y, and z are the coordinates of the points on the surface of the sphere.
Step-by-step explanation:
Answer:
18. x=2.525
19. x=62.55
20. x=1.75
Step-by-step explanation:
Answer:
360 people out of 1200 are likely to have red hair.
Step-by-step explanation:
So I just saw that 100 x 120 equals 1200. So I just need to multiply 3 x 120 and I got 360. I think this is how to solve?
Answer:
720 copies must be sold to break even
Step-by-step explanation:
The break even point is the point where the revenue from sales equals the total cost.
The total cost can be expressed as;
Total cost=Initial costs+(cost per book×number of books made)
where;
Initial cost=$864
Cost per book=$0.80
Assume number of books made=n
replacing;
Total cost=(864)+(0.80×n)=$864+0.8 n
Total cost=0.8 n+864...equation 1
The total revenue from the book sale can be expressed as;
Total revenue=Price per book×number of books sold
where;
Price per book=$2
number of books sold=n
replacing;
Total revenue=(2×n)=2 n...equation 2
Equate equation 1 to equation 2
0.8 n+864=2 n
2 n-0.8 n=864
1.2 n=864
n=864/1.2
n=720
720 copies must be sold to break even
Answer:
Step-by-step explanation:24 liters of jam after 4 days. How much jam did Alexa jar if she spent 8 days making jam? Assume the relationship is directly proportional.