Karyn is helping her mother put their books on shelves. They can fit 20 books on each shelf. If they have 70 books, how many shelves will they need to use?

im sorry but no. i just need to answer for 50 poonts oof

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)

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.