Solve the problem.If you measure the circumference of a circle to be 20 inches, estimate the length of its radius. Use ? on your calculator and round to the nearest hundredth.
A. 3.18 in.
B. 4.18 in.
C. 6.37 in.
D. 3.33 in.
Answer: A
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Doris invested some money at 7% and some money at 8%. She invested $4,000 more at 8% than she did at 7%. Her total yearly interest from the two investments was $470. How much did Doris invest at each rate?
A. $100 at 7%, $4,900 at 8% B. $2,000 at 7%, $5,000 at 8% C. $1,000 at 7%, $6,000 at 8% D. $1,000 at 7%, $5,000 at 8% E. $1,500 at 7%, $4,500 at 8%
Provide an appropriate response. How do you know whether to use the law of sines or the law of cosines in solving for missing parts of a triangle?
What will be an ideal response?
Solve the problem.Pennies are packaged 50 in a roll. A mother gave her son 191 pennies for his bank and had 9 pennies left over. How many rolls of pennies did she use?
A. 6 rolls B. 7 rolls C. 5 rolls D. 4 rolls
Rationalize the denominator. Assume that all variables represent positive real numbers.- 
A. -3
B. - 
C. -40
D. - 