SOLUTION: you are babysitting the neighbors 1 yr old and need ro give the baby a bath. the water in the tub is 120 degrees F which is too hot. you want to wait until it cools to 85 degrees F
Algebra.Com
Question 608376: you are babysitting the neighbors 1 yr old and need ro give the baby a bath. the water in the tub is 120 degrees F which is too hot. you want to wait until it cools to 85 degrees F. if the cooling rate of the water is 0.074 and the room tempature is 70 degrees F, how long until you can give the baby a bath?
i have equation
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
Plug in the values you know:
e^{-rt}\ +\ T_r)
e^{-0.074t}\ +\ 70)
A little algebra music, Sammy!
Take the natural log of both sides:
\ =\ \ln(0.3))
Use
\ =\ n\log_b(x))
to write:
\ =\ \ln(0.3))
and use
\ =\ 1)
to write
)
Then solve for 
time units. Can't say what time units because you don't say what time units are related to your cooling rate. Though given the numbers, I would guess minutes.
}{-0.074})
John
My calculator said it, I believe it, that settles it
RELATED QUESTIONS
Water temp. coming into the house is 60 degrees f, some of the water goes into the hot... (answered by stanbon)
I need help in solving:
Harrison took a bath 1 hour before going to bed. He filled the... (answered by ikleyn)
A 120-gallon tub has a drain which, when open, drains water at the rate of 6 gallons per... (answered by Earlsdon)
assume that when you take a bath, you fill a tub to the halfway point. the tub measures 6 (answered by macston)
A bath tub can be filled by the cold water and hot water pipes in 10 mins and 15 mins,... (answered by josgarithmetic)
A hot water tap can fill a bath in 5 minutes , while a cold water bath can fill the same... (answered by josgarithmetic)
6. You fill a 1712 17 , and 1 half gallon tub 17 1 seventh full of water. How many... (answered by Alan3354)
A bath can be filled by the cold water faucet in 10 minutes and by the hot water faucet... (answered by solver91311)
Hi I am needing some help with this word problem please.
A bathtub can be filled by... (answered by josmiceli)
