195=67+(200-67)e^(-10k)
195=67+133e^(-10k)
128=133e^(-10k)
128/133=e^(-10k)
ln(128/133)=-10k
k=-ln(128/133)/10
T(t)=67+133e^(tln(128/133)/10), if T(t)=180
180=67+133e^(tln(128/133)/10)
113=133e^(tln(128/133)/10)
113/133=e^(tln(128/133)/10)
ln(113/133)=tln(128/133)/10
10ln(113/133)=tln(128/133)
t=10ln(113/133)/ln(128/133)
t≈42.5 minutes...
t≈40 minutes (to nearest 5 minutes? :P)
Answer:
the 3rd one
Step-by-step explanation:
$3.12÷8=$0.39
$3.06÷9=$0.34
$0.39 is 0.05 more than $0.34
Answer:
it will cost 28$ or whatever that symbol is
Step-by-step explanation:
Answer:
$258.75
step-by-step explanation:
$250 • 3.5%
8.75
$250 + 8.75%
$258.75
