five identical machines produce the same parts at the same rate. The 5 machines complete the required number of parts in 1.8 hours. How many hours does it take 3 machines to produce the same number of parts

answer:

for 91 to be an integer, 91 has to be a whole number. furthermore, for 91 to be an integer, you should be able to write 91 without a fractional or decimal component. 91 is a whole number that can be written without a fractional component, thus 91 is an integer. the answer to the question: "is 91 an integer? "

step-by-step explanation: