A physics student spends part of her day walking between classes or for recreation, during which time she expends energy at an average rate of 270 . The remainder of the day she is sitting in class, studying, or resting; during these activities, she expends energy at an average rate of 100 .

If she expends a total of 1.5×107 of energy in a 24-hour day, how much of the day did she spend walking?

Hello, I don't know how to solve this problem .. but I took the answer from a site
and the answer is 10.39 hours but the system said that it's wrong and try again
and when i submitted it , they give me a note which said :

as technology advances, new experiments often expose problems in accepted theories. c

hope i

-lavira: )

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

hi,

what occurs during a solar eclipse?

there are small tides across earth.

the moon is between earth and the sun.

p.s. im not sure if the first answer is correct because during a solar ecliphse there are spring tides and i dont know if they are the same.