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.

Questions 9-10. use the table of educational expenditures to answer the questions. k-12 education expenditures population indiana $9.97 billion 6.6 million illinois $28.54 billion 12.9 million kentucky $6.58 billion 4.4 million michigan $16.85 billion 9.9 million ohio $20.23 billion 11.6million 9. if the amount of k-12 education expenses in indiana were proportional to those in ohio, what would have been the expected value of k-12 expenditures in indiana? (give the answer in billions rounded to the nearest hundredth) 10. use the value of k-12 education expenditures in michigan as a proportion of the population in michigan to estimate what the value of k-12 education expenses would be in illinois. a) find the expected value of k-12 expenditures in illinois if illinois were proportional to michigan. (give the answer in billions rounded to the nearest hundredth) b) how does this compare to the actual value for k-12 expenditures in illinois? (lower, higher, same? )