Solve the formula for the stated variable.S = 4?r2; solve for r2
A. r2 = 
- 4
B. r2 = S - 4?
C. r2 = 
D. r2 = 
Answer: D
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Find the standard deviation s for the given data. Round your answer to one more decimal place than the original data.A company had 80 employees whose salaries are summarized in the frequency distribution below. Find the standard deviation. 
A. 7307.7 B. 8111.5 C. 7892.3 D. 7673.1
Perform the indicated operations. Express the answer as a single polynomial in standard form.(x - 11)(x2 + 4x - 7)
A. x3 + 15x2 + 51x + 77 B. x3 + 15x2 + 37x - 77 C. x3 - 7x2 - 37x - 77 D. x3 - 7x2 - 51x + 77
Evaluate the given binomial coefficient.
A. 140 B. 70 C. 35 D. 1680
Solve the problem.A rare species of insect was discovered in the rain forest of Costa Rica. Environmentalists transplant the insect into a protected area. The population of the insect t months after being transplanted is P(t) = 
.a) What was the population when t = 0?b) What will the population be after 10 years?c) What is the largest value the population could reach?
What will be an ideal response?