Answer:
Option C.
Step-by-step explanation:
From the given figure it is clear that
So,
Using Intersecting Secants Theorem, we get
Divide both sides by 4.
Since, x = 11; PR = 12; PT = 15, therefore the correct option is C.
In this question, it is given that
Curium-243 has a half-life of 28.5 days. In a sample of 5.6 grams of curium-243.
And we have to use the following formula, which is

Here t=12 days, half life, h =28.5 days . And the initial value ,A(0)=5.6 gms
So we will get


Therefore after 12 days, 4.2 gmsof curium-243 remains .
Answer:
pic below
Step-by-step explanation:
Answer:
7.5N
Step-by-step explanation:
The equation for force:
F = m * a
where F is force, m is mass, and a is acceleration
F = .5 kg * 15 m/s² = 7.5 N