Question

question 15
sam’s ecology grades are weighted. their tests are worth 50% of the total grade, homework’s worth 5%, and labs are worth 45%.
sam made an average of 63 on tests, 52 on homework, and 49 on labs.
what is sam’s overall average grade in ecology?
(round your answer to two decimal places.)

Explanation:

Step1: Calculate test contribution

Tests are 50% (0.5) of grade, Sam scored 63. Contribution: \( 63 \times 0.5 = 31.5 \)

Step2: Calculate homework contribution

Homework is 5% (0.05) of grade, Sam scored 52. Contribution: \( 52 \times 0.05 = 2.6 \)

Step3: Calculate lab contribution

Labs are 45% (0.45) of grade, Sam scored 49. Contribution: \( 49 \times 0.45 = 22.05 \)

Step4: Sum contributions for overall grade

Add the three contributions: \( 31.5 + 2.6 + 22.05 = 56.15 \)

Answer:

56.15