Use the partial sum formula to find the partial sum of the given arithmetic sequence.Find the sum of the first five terms of the arithmetic sequence: -10, -14, -18, . . . .
A. -42
B. 90
C. -70
D. - 90
Answer: D
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The function s gives the displacement (in ft) of an object as a function of time (in seconds). Calculate values of the average velocity for the given values of t and find the instantaneous velocity at the indicated value of t by noting the limit of the average velocities.s = 5t - 4; when t = 4; use values of t of 3.5, 3.9, 3.99, 3.999
A. Average velocities: 19.5, 19.9, 19.99, 19.999
v = 20 ft/s
B. Average velocities: 20, 20, 20, 20
v = 20 ft/s
C. Average velocities: 5, 5, 5, 5
v = 5 ft/s
D. Average velocities: 4.5, 4.9, 4.99, 4.999
v = 5 ft/s
Solve the problem.Erica Tomlinson's credit card company determines her minimum monthly payment by adding all new interest to 2% of the outstanding principal. The credit card company charges an interest rate of 0.04696% per day. On October 15, Erica uses her credit card to purchase a custom set of wheels and tires for her car for $1500. She makes no other purchases during October. Assuming Erica had no new interest, determine Erica's minimum payment due on November 1, her billing date.
A. $41 B. $42 C. $31 D. $30
Use the even-odd identities to find the exact value of the expression. cos (-30°)
A. - 
B. - 
C. 
D. 
Solve the problem. Round to the nearest tenth if necessary.Last year, Maria earned $349 per week. This year, her salary increased to 
per week. What is the percent of increase?
A.
| 92.3% |
B.
| 7.2% |
C. 7.7%
D.
| 92.8% |