If tan (k•90)=0 then k is an even integer true of false

True

Step-by-step explanation:

Use the unit circle

tan(x) = 0 only when x is 0 or a multiple of 180 (in degrees)

The volume of the block is cubic cm. The number of cubic wooden blocks with a side length of 1/8 cm that can be cut from the rectangular block is 15.

Step-by-step explanation:

The volume of a rectangular prism is given by :-

Given: A solid wooden block in the shape of a rectangular prism has a length,width and height of 3/8 cm, 1/8 cm, and 5/8 cm, respectively.

Now, the volume of a wooden block will be :-

The volume of cubic block with side length of 1/8 cm is given by :-

Now, the number of cubic wooden blocks with a side length of 1/8 cm that can be cut from the rectangular block  is given by :-