155 students will take the unit test tomorrow. If 50 pass what percent of students did not pass?

around 78 students since it isn't an even number

Step-by-step explanation:

You figure this out by doing:

155 times .50 or 50% = 77.5 and since you can't have half a person we'll round down, making it 77

Then you minus 77 from 155 = 78

answer are

step-by-step explanation:

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents