Answer:
The shadow cast by the tree is 80 meters long.
Step-by-step explanation:
Flagpole:
object/shadow
25/50 = 1/2
Tree:
object/shadow
40/x
Solve for x:
1/2 = 40/x
x = 80
Answer:
Step-by-step explanation:
Answer:
your answer is D. hope this helped
A: His texting speed after one month of practice would be 2 1/2 characters per second. (2 + 1/2)
B: His texting speed after two months of practice would be 3 characters per second. (2 1/2 + 1/2)
C: His texting speed after three months of practice would be 3 1/2 characters per second. 3 + 1/2)
D: Algebraic Expression: s = 1/2m + 2
The percentage of the original activity in the sample remains after 17.5 days is obtained as N(t) / No x 100%.
<h3>
What is half life?</h3>
Half-life is the time required for a quantity to reduce to half of its initial value.
The original activity in the sample that remains after 17.5 days is calculated from half life equation as shown below;
N(t) = No(¹/₂)^t/h
where;
- N(t) is the mass of the substance remaining
- No is the initial mass of the substance
- t is time elapsed = 17.5 days
- h is the half life of the substance
percentage of the original activity in the sample remains after 17.5 days;
= N(t) / No x 100%
Thus, the percentage of the original activity in the sample remains after 17.5 days is obtained as N(t) / No x 100%.
Learn more about half life here: brainly.com/question/2320811
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