Can anybody me find the answers to these problems

see explanation

Step-by-step explanation:

(1)

the volume (V) of a cube of side s is V = s³ = 64

Take the cube root of both sides

s = = 4 in

(2)

the area (A) of a square face = s² = 4 × 4 = 16 in²

(3)

the surface area (SA) is the area of all 6 faces of the cube, hence

SA = 6 × 16 = 96 in²

(4)

the amount of wood required is the value of the surface area, that is

96 in² of wood is required to make the box

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: