The following table shows the running speed R, in centimeters per second, of ants as a function of the temperature T in degrees Celsius. Use linear regression to model running speed as a function of temperature.
 T 25.6 30.3 32.3 34.8 R 2.15 3.29 4.87 5.24?
?

A. ?
B.
C.
D. ?


Answer: C

Mathematics

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Use the square root property to solve the equation.x2 = 135

A.
B. 15
C. -3, 3
D. 3

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Solve the problem.When an alternating current passes through a series RLC circuit, the voltage and current are out of phase by angle ?. Here ? = tan-1[(XL - XC)/R], where XL and XC are the reactances of the inductor and capacitor, respectively, and R is the resistance. Find d?/dXL for constant XC and R.

A.
B.
C.
D.

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Solve the equation. = 11

A. -11 B. -11, 11 C. 121 D. 11

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Perform the indicated operations and simplify the result. Leave the answer in factored form.

A.
B.
C.
D.

Mathematics