Temperature 5

Temperature outside starts at 0 Fahrenheit. Over time the temperature changes at a rate of -0.6 Fahrenheit per hour. How long will it take for the temperature to reach -4.5 Fahrenheit?

Correct result:

t =  7.5 h

Solution:

$$\begin{gathered} t_1=-4.5^{\circ }\text{F } \\ {t}_0=0^{\circ }\text{F } \\ r=-0.6^{\circ }\text{F/h } \\ t=(t_1-t_0)\mathrm{/}r=((-4.5)-0)\mathrm{/}(-0.6)={\displaystyle \frac{15}{2}}={\displaystyle \frac{15}{2}}\text{ h}=7.5\text{ h} \end{gathered}$$

Try another example

Showing 1 comment:

Math student

well done thanku

2 years ago  Like

Next similar math problems:

• Temperature increase
  If the temperature at 9:am is 50 degrees. What is the temperature at 5:00pm if the temperature increases 4 degrees Fahrenheit each hour?
• Mixing Celsius and Fahrenheit
  Add up three temperatures: 5°F +6°F +0°C
• The temperature 5
  The temperature at 4pm was 53° Fahrenheit the temperature dropped 3° each hour from 4pm to 9pm which equation below accurately represents the temperature at 9pm
• Temperature change 2
  The outside temperature changed -14F over 4 hours. If the temperature changed the same amount each hour, what was the change in temperature each hour?
• Rate 3
  A liquid is heated at a rate of 5 degrees Celsius per minute. If the temperature now is at 39 degrees Celsius, after how long will the temperature be 94 degrees Celsius?
• Beer
  Which beer is better to drink: small beer (0.3 L) for 0.67 € or large (0.5 L) for 1.81 €?
• Weather
  Weather. At 5:00 a. M. , the temperature was 28°C and at noontime it rose by 9°C. By 4:00 p. M. , it dropped 3°C and by nighttime it was 4°C less. What is the room temperature this time?
• Hens
  11 hens will eat spilled grain from 6AM to 16 PM. At 11 hour grandmother brought 4 hens from the neighbors. At what time was grain out?
• The temperature 3
  The temperature is -12 degrees Fahrenheit. During the following 5 hours, the temperature decrease by 23 degrees Fahrenheit. What is the weather at 11 pm?
• Laboratory
  Mang Elio went to his laboratory at 7:00am And recorded that the temperature was 11.07°C. At lunchtime, the temperature rose by 27.9°C but dropped by 8.05°C at 5:00 PM. What was the temperature at 5:00 PM?
• Reconstruction of the corridor
  Calculate how many minutes will be reduced to travel 187 km long railway corridor, where the maximum speed increases from 120 km/h to 160 km/h. Calculate how many minutes will shorten travel time, if we consider that the train must stop at 6 stations, eac
• Water level
  To cuoid shaped poll, bottom size 2m and 3.5m; flows water at a rate of 50 liters per minute. How long will take to water reach level 50 cm?
• A cold front
  At 1:00 PM, the temperature was at 46 degrees. Then, a cold front moved in and decreased the temperature 12 degrees per hour. The temperature at 6:00 PM = _____ degrees.
• Temperature change
  The mean temperature change is -3.2°F per day for five days. What is the total change over the five day period?
• Pedestrian
  Dana started at 10:00 from the point A to point B. These points are distant 12 km. Determine how fast Daniel went when the place B arrived at 11:54. Speed express in km/h.
• Cyclist and car
  A cyclist who runs at a speed of 20km per hour will arrive at the finish in 4.5 hours. How fast does the car have to drive the same route in 2 hours?
• Equal temperature
  The temperatures of the two cities were measured at the same time. The temperature in city A was 60 degrees And rose at a constant rate of 2 degrees per hour. The temperature in city B was 40° and rose at a constant rate of 10° per hour Enter the time in