The width of the rectangle below is 6cm and it’s perimeter is 42cm. what is the area?

Ineed with number 6 , explain how to get 1978

With alll of except for the 2 that i did already

Use your knowledge of the binary number system to write each binary number as a decimal number. a) 1001 base 2= base 10 b) 1101 base 2 = base 10