A waitress sold 20 ribeye steak dinners and 12 grilled salmon​ dinners, totaling ​$559.11 on a particular day. Another day she sold 29 ribeye steak dinners and 6 grilled salmon​ dinners, totaling ​$583.72 How much did each type of dinner​ cost?

Summarize the work of famous environmental scientists of the past.

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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