If the time is 9:20 am. What time will it be after three hours and fifty minutes?

1:10

Step-by-step explanation:

Hey there

to solve this problem think 9:20 and 3:50 as ratios. In this problem we will add these too

9:20 + 3:50= 12:70

so, if it is 12:70. in one hour there is 60 and in the 12:70 it 70. so we add one more hour it will be 1:10

= 1:10

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

c 1 hour

step-by-step explanation:

m = 2e

m = 2 so 2 = 2e

1 = e