I need help. "In 1990, the cost of U. S. postage stamp was 25 cents. In 2010, the cost of a U. S. postage stamp was 44 cents. In 20 years, what was the percent of increase in the cost of U. S. postage stamps?"
It has to be an algebraic solution and showing all your work. Thank you!

a c

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.

i think the answer is c sorry if it's wrong