A school cafeteria sold 1,600 slices of pizza the first week, 800 the second week, 400 the third week if this patter continues,

Question

2 years ago

11

in what week will the cafeteria sell 50 slices? Explain your anwser

2 answers:

Mariulka [41] · Answer 1 · 2022-05-23T13:23:28+03:00

7 0

Answer:

6th week.

Step-by-step explanation:

Each week he is selling 1/2 of the week before so

In the 3rd week he sells 400

- in the 4th week it will be 200

- in 5th week 100

- in 6th seek 50.

zalisa [80] · Answer 2 · 2022-05-23T15:09:31+03:00

5 0

Answer: 6th week

Step-by-step explanation:the number of weeks is moving in a geometric proportion

Remember Tn = ar^n-1

Tn = 50, r = 800/1600= 1/2, a = 1600

So 50 = 1600 * 1/2^ n-1

50/1600 = 1/2^ n-1

1/32 = 1/2^ n-1

2^ -5 = 2^ -n+1

Equating powers

-5 = -n + 1

-n = -6

n = 6