A thermometer is taken from an inside room to the outside, where the air temperature is 30° F. After 1 minute the thermometer reads 80° F, and after 5 minutes it reads 55° F. What is the initial temperature of the inside room? (Round your answer to two decimal places.)

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?