An experiment is to be conducted using an environmentally safe electronic deterrent system to study the effectiveness of deterring woodpeckers from damaging trees. The electronic system can be set to four frequencies to deter the woodpeckers. The researchers will determine the adverse reaction of the woodpeckers to the electronic deterrent by starting with trees with no holes and counting the number of holes after one week of using the deterrent. There are 48 woodpeckers available for the experiment, and the researchers will use 12 birds for each frequency of the electronic deterrent. For this experiment, identify the treatments, experimental unit, and response variable.

they used 313 gallons of paint

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.

the answer would be a 24

step-by-step explanation:

c=2πr=2·π·3=24