learning task 2:read and analyze the given problem below on a sheet of paper. in a classroom there are five 20 -watt fluorescent lamps and four 50 watt electric fans operating for 10 hours in a regular school day​

15kWh in 5 days

Step-by-step explanation:

Given

Let

---- Time

Required

Total energy consumed in 5 days

For the lamps, we have:

Calculate the energy consumed by the lamps in a day.

For 1 lamp, we have:

For 5, we have:

Convert to kilowatt

In 1 day, the 5 bulbs use a total energy of:

For 5 days, the energy is:

For the fans, we have:

Calculate the energy consumed by the fans in a day.

For 1 fan , we have:

For 4, we have:

Convert to kilowatt

In 1 day, the 4 fans will use a total energy of:

For 5 days, the energy is:

So, we have:

------ Lamps

----- Fans

The total energy used is:

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.