Find a formula for the inverse of the function described below.A size 34 dress in Country C is size 9 in Country D. A function that converts dress sizes in Country C to those in Country D is 
A. f-1(x) = x + 8
B. f-1(x) = 2(x + 8)
C. f-1(x) = 2x + 8
D. f-1(x) = 2(x - 8)
Answer: B
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Determine the limit by sketching an appropriate graph.
f(x), where f(x) = 
A. 2 B. 3 C. 18 D. -7
Find the amount of taxable income and the tax owed. The letter following the name indicates the marital status, and all married people are filing jointly. Use $3700 for each personal exemption; a standard deduction of $5800 for single people, $11,600 for married people filing jointly, $5800 for married people filing separately, and $8500 for head of a household; and the following tax rate schedule. 
A. $9208; $956.20 B. $3408; $340.80 C. $6835; $683.50 D. $3135; $313.50
Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. An insurance company is willing to insure the concert for $150,000 against rain for a premium of $30,000. If he buys this policy, what are his expected earnings from the concert?
A. $180,000 B. $300,000 C. $270,000 D. $239,400
Use the dimensions in the illustration to find w, the width of the river, if src="https://sciemce.com/media/3/ppg__cognero__Section_9.5_Congruent_Triangles_and_Simliar_Triangles__media__9381e946-933c-4326-a63b-2c09fa0ada8e.PNG" class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_a91bfae55c98422b85218cd61" />.
?
, 
, and 
?
A. 64
B. 80
C. 
D. 
E. none of these