Pls help me , i rlly need help 1 Write the multiplicative inverse of : {-8/7 x 21/32}

2 Calculate the final value of (4/5 to the power of -2

3 Arrange the rational numbers in the descending order: 13/10, 7/25, 9/5

4 The population of a state is 21600000. Express the number in the scientific form.

5 Express the number 3125 in the exponential form.

6 Represent – 9/6 and 5/6 on the number line.

Simplify: 52 raised to the power15 ÷ 13 raised to the power 15
8 One coin weighs 5 3/4 g. Calculate the weight of 12 coins.