What percent of 80 is 248

%310

Step-by-step explanation:

Step 1:  Convert words into an expression

What percent of 80 is 248

80x = 248

Step 2:  Solve for x

80 * x / 80 = 248 / 80

x = 3.1 * 100

x = 310

x = %310

 %310

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)