How may permutations of the word “spell” are there? there are
a0 ways.

Hence,  permutations of the word “spell” is:

5!/2 i.e.60 ways are there

Step-by-step explanation:

We have to find the permutation of the word "spell"

The number of permutation of any word is

  factorial of number of alphabets(letters) in the word/product of the factorial of numbers of times the alphabet(letter) has come

Here the total alphabets are 5 so numerator will be 5!

Now the letter 'l' has come 2 times and all other letter has come once so, denominator will be 2!1!1!1!=2

Hence,  permutations of the word “spell” =5!/2=60

answer:

the position of equilibrium will shift to the left.

step-by-step explanation:

the general equation for the dissociation of a weak base is

b + h₂o   ⇌   bh⁺ + oh⁻

according to le châtelier's principle, when a stress is applied to a system at equilibrium, the system will respond in a way that tends to relieve the stress.

if you apply a stress by adding more bh⁺ or oh⁻,   the system will respond by moving in a direction that gets rid of the added ions.

the position of equilibrium will shift to the left, forming more of the undissociated base.

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.