At the store, a package of four aa batteries costs $3.92. a package of eight of the same batteries
cost $7.60
a.) which package is the better buy? justify your answer.
b.) if you needed to purchase 16 batteries, how much money would you save by purchasing the
package of batteries that is a better buy? show your work and explain your answer.

Part a) A  package of eight AA batteries is the better buy

Part b)

Step-by-step explanation:

Part a) Which package is the better buy?

To find the better buy, calculate the unit rate

A  package of four AA batteries costs $3.92

so

The unit rate is equal to  

A  package of eight AA batteries costs $7.60

so

The unit rate is equal to  

therefore

A  package of eight AA batteries is the better buy

Part b) If you needed to purchase 16 batteries, how much money would you save by purchasing the  package of batteries that is a better buy?

If you buy two package of eight batteries (16 batteries)

then

The cost would be  ------>

If you buy four package of four batteries (16 batteries)

then

The cost would be ----->

therefore

Purchasing the  package of batteries that is a better buy

you save

5y

step-by-step explanation:

answer:

total cost for tiles and paints is $924.  

step-by-step explanation:

we have been given that a community hall is in the shape of a cuboid. the hall is 40m long 15m high and 3m wide.

the paint will be required for 4 walls and ceiling.

let us find area of walls and ceiling.

therefore, the area of walls and ceiling is 1410 square meters.

given: cost for 10 litre of paint is $10 and 10 litre paint covers 25 square meter. therefore,

therefore, the total painting cost is $564.

tiles will be required for floor. let us find the area of floor.

given: 1m squared floor tiles costs $3. so,

therefore, the total tiles cost is $360.

now let us find combined total cost of tiles and paint.

therefore, the combined total cost of tiles and paint is $924.