Question

Find the value or y, rounded to the nearest tenth.

12.7
13.3
11.7
12.4​

Answer 1

The answer is 12.4

................................

Answer 2

D. 12.4

Explanation:

We are given the figure with measurements,

PT = y

PA = 7

AB = 15

where P, T, A and B are located as in the figure below.

Now, we know the formula that,

`PT^(2)=PA * PB`

i.e.
`y^(2)=7 * (15+7)`

i.e.
`y^(2)=7 * 22`

i.e.
`y^(2)=154`

i.e. y= ± 12.4

Since, the length cannot be negative.

Thus, option D i.e. y = 12.4 is correct.