1: what is 15: 25 as fraction in simplest form.
a: 15/25
b: 3/5
c: 1/3
d: 30/50
2: which number is equivalent to 3/7
a: 6 to 10
b: 76: 107
c: 12/35
d: 7 to 3

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)

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .