This morning 45 students showed up to school early. 40% of that showed up did not have a backpack on. How many students did not showed up with a backpack on?

Step-by-step explanation:

if your dong 40% of 45 t will be 18

18

Step-by-step explanation:

To solve we fist need to figure out what 40% is in decimal form. To do this we have to move the decimal point to the left 2 spaces.

40% -> 0.40

Then we can multiply...

45 · 0.40 = 18  (This means that 40% of the total 45 students is 18).

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.