Muhammed found that some of the initial marks at the beginning of her ruler are faded. So, he decided to use the 2cm mark for measuring the lengths. What is the length of PQ if the centimetres mark against the point Q is 11.5?

step-by-step explanation:

left be aligning the decimal points is required to not required see the number of digits to the right

answer: the answer is 110

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus