For parts a and b, the variable C represents the consumption of products in Country A in billions of dollars, and D represents disposable income in Country A in billions of dollars. Suppose economists use the following equation as a model of Country A's economy.

C = 0.5873D+5.9274

a)

Solve the equation for D.

b)

Use this result to determine the disposable income D if the consumption C is

$9.69

billion.

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Part 1

a)

Solve the equation for D.

D= _____

(Use integers or decimals for any numbers in the expression. Simplify your answer.)

Part 2

b)

Use this result to determine the disposable income D if the consumption C is $9.69 billion.

$_____ billion

(Simplify your answer. Round the final answer to one decimal place as needed. Round all intermediate values to four decimal places as needed.)