Solve the problem.Simple interest is calculated using the formula, interest = principal ? rate ? time or i = prt. Jenny Brooks invested a certain amount of money saved for 1 year at a certain annual interest rate (simple interest) yielded $6.75 in interest. If we had added $90 to the principal and reduced the interest rate by 2 percentage point(s), the interest would have been the same. Find the principal and the rate.
A. $135.00, 5%
B. $7.00, 5%
C. $7.00, 3%
D. $9.06, 630%
Answer: A
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Use Fleury's algorithm to find an Euler circuit for the graph beginning and ending at the indicated vertex. If no Euler circuit exists, state this.Using the following graph, find an Euler circuit that begins and ends with vertex C.
A. C ? D ? A ? E ? F ? A ? B ? C B. C ? D ? A ? E ? F ? A ? B ? C ? D C. No Euler circuit exists. D. C ? D ? A ? E ? F ? A ? B
Determine if the plot is the graph of a function.
A. Yes B. No
Solve the problem.Along with incomes, people's charitable contributions have steadily increased over the past few years. The table below shows the average deduction for charitable contributions reported on individual income tax returns for the period 1993 to 1998. Find the average rate of change between 1995 and 1997.
A. $360 per year B. $560 per year C. $310 per year D. $280 per year
In the problem, t is a real number and P = (x, y) is the point on the unit circle that corresponds to t. Find the exact value of the indicated trigonometric function of t.(- 
, 
)Find cos t.
A. - 
B. - 
C. 
D. - 