A builder needs to cover 10 square yards of floor with tile. Red tile costs $60 per square yard, and white tile costs $40 per square yard. If the builder spends exactly $520 on tile, how much of the floor will be covered with red tile?

Abacterium was found to contain a sequence of atcgggatcct in its genome. a few generations later, the sequence was found to be atcatcct. what type of mutation caused this change in the bacteria? a. duplication b. insertion c. inversion d. translocation