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2 years ago

15

what elements are in the most common substance in the human body? a. carbon and nitrogen b. hydrogen and oxygen c. oxygen and ph

osphorus d. calcium and nitrogen

1 answer:

evablogger [386]2 years ago

7 0

B. Hydrogen and Oxygen

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A student's grade goes from a 95 to a 65 in 3 weeks. Calculate

steposvetlana [31]

-10grade/week

Explanation:

Given parameters:

Initial grade = 95grade

Final grade = 65grade

Time = 3weeks

Unknown parameter:

Rate of change of grade = ?

Solution:

Rate is defined as the change of a quantity with time.

Rate of change of grade = $\frac{Final grade - Initial grade}{Time}$

Rate of change of grade = $\frac{65 - 95}{3}$ = $\frac{-30}{3}$

Rate of change of grade = -10grade/week

The rate of change of the student's grade is -10grade/week. It implies that the grade of the student reduces by 10unit per week.

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Explanation:

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