Which number expresses 6.72 as a fraction in simplest form?

168/25

Step-by-step explanation:

Convert to a mixed number by placing the numbers to the right of the decimal over 100

. Reduce the fraction. Then, convert the mixed number to an improper fraction by multiplying the denominator by the whole number and adding the numerator to get the new numerator. Place this new numerator over the original denominator.

168/25

168/25

Step-by-step explanation: The answer for 6.72 as a fraction in simplest form is 168/25. You can solve this using long division method. There are six 25s in 168 which is 150 and the remaining 18 can become the decimal which is 0.72. Or for simplicity, you can use a scientific calculator to evaluate the result of 168/25.

step-by-step explanation:

the value of v.w= -12.

step-by-step explanation:

we are given three vector r,v and w as:

r = < 5, -5, -2> ; v = < 2, -8, -8> ; w = < -2, 6, -5>

we know that r,v and w could also be represented as:

r=5i-5j-2k

v=2i-8j-8k

and w= -2i+6j-5k

where i,j and k are the unit vectors of x,y and z-axis respectively.

also we know that it has the following property:

i.i=1 ; j.j=1; k.k=1

and i.=j.i=i.k=k.i=j.k=k.j=0

i.e. when we multiply two vectors or we find it's dot product we need to only multiply the components of x coordinates with each other; y with each other and z with each other.

hence, v.w= (2i-8j- -2i+6j-5k)

                  = 2×(-2)+(-8)×(6)+(-8)×(-5)

                  = -4-48+40

                  = -12

hence, v.w= -12