End of Course Boot Camp (Modified)

In the equation T = 1.065x, what does the number "1.065" represent?

• It represents $106.50, which is the total cost for the purchases made by Charles.

• It represents the 106.5%, so when multiplied by the pretax cost of the purchase, the resulting product is the total cost, including state sales tax..

• A. I, only

• B. III, only

• C. I, II, IV

• D. II, III, IV

• C. 10

• D. None of the above are correct.

• D. None of the above are equivalent.

Which of the following statements is not always true?

• The product of a nonzero rational number and irrational number is irrational.

• The product of two irrational numbers is irrational.

• The sum of two rational numbers is rational.

• The sum of a rational number and an irrational number is irrational.

In ideal conditions, 200 colony-forming units (cfu) of E.coli can grow to 400 cfu in 20 minutes, to 800 cfu in 40 minutes, and to 1600 cfu in an hour.

Jenny says that the E. coli growth can be modeled with an exponential function. Do you agree? Justify your answer.

• x=-5,5

• x=-2,2

• No solution

• x=0

• The expression that represents the sum of the polynomials is a first-degree polynomial.

• The expression that represents the difference of the polynomials illustrates that polynomials are closed under subtraction.

Which of the following statements about closure is NOT true?

• Polynomials are closed under addition.

• Polynomials are closed under subtraction.

• Polynomials are closed under multiplication.

• Polynomials are closed under division.

Robin says that polynomials are closed under division. Brad adamantly disagrees. Who is correct? Justify your answer.

• Brad

• Robin