Find the indicated quantity.a8, when a1 = 5 and d = 2
A. 21
B. -11
C. -9
D. 19
Answer: D
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Refer to the given map. Assume that the length of each east-west block is 
mile and the length of each north-south block is 
mile. 
Find the straight-line distance between the grocery store and the library.
A. 0.63 mi B. 0.48 mi C. 0.75 mi D. 0.56 mi
Solve.The hydrogen ion concentration of a substance is about 5.4 × 10-2 moles per liter. Find the pH. Round to the nearest tenth. Use the formula pH = -log [H+].
A. 1.3 B. 1.6 C. -2.7 D. 2.7
Identify the following as rational or irrational. If the number is rational, find the root exactly. If the number is irrational, approximate the number to the nearest thousandth when necessary.
A. Rational; 21 B. Irrational; 7.937 C. Rational; 31.5 D. Irrational; 3.979
Solve the problem.A twelve-sided die is weighted so that only the numbers 1 through 6 will appear and they will occur with the same probability. What probability should be assigned to each face?
What will be an ideal response?