Find the product or quotient, using trigonometric form. Write the answer in the form a + bi.(6 - 6i)(7 + 8i)

A. -48i2 + 6i + 42
B. 90 - 6i
C. -6 - 90i
D. 90 + 6i


Answer: D

Mathematics

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Provide an appropriate response.Poaching is causing a population of elephants to decline by 5% per year. Use the approximate half-life formula to determine the fraction that remains in 59 years if there are 8661 elephants today.

A. 18,250 elephants B. 4829 elephants C. 467 elephants D. 8243 elephants

Mathematics

Evaluate.62 × 42

A. 526 B. 536 C. 516 D. 576

Mathematics

Solve. - 2 = 13

A. -10, 10 B. 16, 10 C. -20, 10 D. -6, 10

Mathematics

Solve the problem.The value of a certain make and model of used car can depend on several factors. The table gives data for the values of three Chevy Caprice station wagons. The value V is measured in dollars, where A is the age of the car in years, and C is the condition of the car rated on a scale of 1 to 10 (10 is excellent condition).The variables are found to be related by the equation  Use the information given in the table to write a matrix equation which when solved will yield the values of a, b, and c. Then, using the fact that the inverse of the matrix 

src="https://sciemce.com/media/4/ppg__file0518192205__f1q74g3.jpg" style="vertical-align: -23.0px;" /> is , find a.

A. a = 15,850
B. a = 14,655
C. a = 15,600
D. a = 14,900

Mathematics