Find the sum. + 6.8
+ 0.74

A) 6.154

B) 7.414

C) 7.54

D) 7.64

C) 7.54

Step-by-step explanation:

first, line up the decimal point, which has been done properly. now, add as though the decimal point doesn't exist, just add normally. you get 754. now, you slide the decimal point down, there are 2 places after the decimal (we assume that 6.8 is 6.80, doesn't change anything), so that's how many will be there in the answer. therefore, 7.54.

C

Step-by-step explanation:

yesh you know

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

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.