Final answer:
The 70th percentile on a 20-question math test with a score of 16 means the score is better than 70% of test-takers. An atom with 20 electrons has an electron configuration of 1s2 2s2 2p6 3s2 3p6. To calculate a total bill amount with a 20% tip, add 20% of the original bill to the original amount.
Step-by-step explanation:
Understanding the 70th Percentile in a Math Test Contexthe context of a 20-question math test, being at the 70th percentile for the number of correct answers means that a score of 16 correct answers is higher than or equal to 70% of the scores from all test-takers. This percentile indicates performance relative to other students, with a higher percentile denoting a higher relative performance. For example, a student in the 70th percentile did as well as or better than 70 out of 100 students.Electron Configuration with 20 ElectronThe electron configuration for an atom with 20 electrons follows the order of filling atomic orbitals: 1s, 2s, 2p, 3s, and 3p. Thus, the electron configuration would be written as 1s2 2s2 2p6 3s2 3p6.
This configuration indicates the distribution of electrons in the atomic orbitals, which determines the atom's chemical properties.Calculating Total Amount with a 20% TipThe subject of this question is Physics. The question is asking about the time it will take for a sprinter to complete a 100-m dash after accelerating at a certain rate for 20 m. To find the time, we need to calculate the time it takes to cover the initial 20 m, and then add it to the time it takes to cover the remaining distance at a constant velocity.To calculate the total amount of a $30.00 bill with a 20% tip, first find the tip amount by multiplying 30 by 20%, which gives $6. Hence, the total amount with tip would be $30.00 (the original bill) plus $6.00 (the tip), equaling $36.00.