3. Find the volume of the sphere pictured below. The sphere has a radius of 20 cm. Use 3.14 for pi. Give your
answer rounded to the nearest tenth.
formula
V=
values
V=
solution with a label
V=

33,493.3 cm³

Step-by-step explanation:

Volume of a sphere of radius r = V = (4/3)πr³

Here the radius is 20 cm.  Therefore, V = (4/3)(3.14)(20 cm)³ = 33,493.3 cm³

The volume of this sphere, to the nearest tenth, is 33,493.3 cm³

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

the ratio of balloons to tables is 5: 2 and the constant variation is 5.

the equation is y=5x