What ratio is equivalent to 8/9

How many grams must be adde to 970g to make 1 and a half kg

Which of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?

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