If a machine requires an output of 5,000 joules of work to put out 4,000joules of work, what is the machines efficieny? (hint: the formula for efficiency is below):

efficiency= output work/
/input work x 100%

answers:
100%
40%
80%
60%

The  machines efficiency is 80% .

Step-by-step explanation:

Formula

Where represented the output work .

represented the input work .

As given

If a machine input of 5,000 joules of work to put out 4,000 joules of work .

Input work = 5000 joules

Output work = 4000 joules

Putting the values in the formula

Efficiency = 80%

Therefore the  machines efficiency is 80% .

d is the correct answer

step-by-step explanation:

x= 8 because 3x = 3 * 8, and 3*8 = 24

for a it would be 24 children.

for b i don't understand the question. is it saying for each individual person they pick 5 reds to 7 greens or is it the whole group. clarify and i hope this can you.

step-by-step explanation: