Write the rational number as a decimal 7 over 40

.175

Step-by-step explanation:

7/40 = .175

40 goes into 7.0 1 time  (40) with 30 left over    the one is after the decimal

40 goes into 300 7 times  (280) with 20 left over  

40 goes into 200  5 times with 0 left over

answer becomes .175

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)

10.4 inches

step-by-step explanation:

2x2x2.6