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Home > CCA2 > Chapter 7 > Lesson 7.2.2 > Problem 7-136

7-136.
  1. Deniz’s computer is infected with a virus that will erase information from her hard drive. It will erase information quickly at first, but as time goes on, the rate at which information is erased will decrease. In t minutes after the virus starts erasing information, 5,000,000()t bytes of information remain on the hard drive. Homework Help ✎

    1. Before the virus starts erasing, how many bytes of information are on Deniz’s hard drive?

    2. After how many minutes will there be 1000 bytes of information left on the drive?

    3. When will the hard drive be completely erased?

5,000,000 bytes

Set the given function equal to 1000 and solve for t.

≈ 12.3 minutes

What is the smallest number of bytes possible before the hard drive is completely erased? Solve for t.