Use half-angle identities to find the exact value of the expression.sin 
A. 
B. 
C. 
D. 
Answer: B
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A bottle of vinegar has a pH of 5.75. What is its hydrogen ion concentration?
A. 5.62 × 10-9 mol/L [H+] B. 8.25 mol/L [H+] C. 5.75 mol/L [H+] D. 1.78 × 10-6 mol/L [H+]
Solve the problem.5 + 8 + 11 + . . . + 755 =
A. 
B. 
C. 
D. 
E. none of these
Find the inventory values using (a) the weighted-average method, (b) the FIFO method, and (c) the LIFO method. Round final answers to the nearest dollar.PurchasesNow in InventoryBeginning inventory: 100 units at $1.68May: 150 units at $2.27August: 250 units at $1.27October: 220 units at $3.09500 units
A. (a) $1,506 (b) $840 (c) $1,545 B. (a) $1,045 (b) $826 (c) $1,065 C. (a) $1,039 (b) $1,065 (c) $826 D. (a) $1,045 (b) $1,065 (c) $826
Solve the problem.The derivative of a function can be used to find the slope of the line tangent to its graph. If the slope of the line tangent to the graph of f(x) = x2 + x at (5, 30) is 11, write the equation of this tangent line.
A. y = -11x + 85 B. y = -11x - 85 C. y = 11x - 25 D. y = 11x + 25