Question

1). Normal force
N=MG cos 37
N=5×10+×4/5
N=40 NT
W=N×D×COS 90
W= 40×3×0
W=0 NT​

Answer 1

Answer:

The age of the person who entered the room is 49.

Step-by-step explanation:

The ages of 5 people in a room are 23, 15, 17, 23, and 23. So mean age is,

Mean = \dfrac{23+15+17+23+23}{5}= 20.2Mean=

5

23+15+17+23+23

=20.2

Let xx be the age of the 6^{th}6

th

person. Then the new mean is 25. So we have the following equation,

\dfrac{23+15+17+23+23+x}{6}=25

6

23+15+17+23+23+x

=25

We can solve this equation to find the value of xx .

\begin{gathered}\dfrac{101+x}{6}=25\\\\101+x=25\times 6=150\\\\x=150-101 =49\end{gathered}

6

101+x

=25

101+x=25×6=150

x=150−101=49