At a middle school, 75% of the sixth-grade students attended the first dance. If there were 105 sixth graders at the dance, how many students are in sixth grade?

140 students in the sixth grade

Step-by-step explanation:

75%= 105 sixth graders

since 75% is 3/4 of 100%

u can find 25% and then add that to 75% to find how many there are:

75/3= 25

105/3=35

25% = 35 sixth graders

25% *4 =100%

35*4= 140

108 six grade students.

Step-by-step explanation: First looked at how many six graders at the middle school is 75% and add how many more six graders to the school dance. The answer is 180 six graders attended to the school dance.

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)