Use a graphing calculator to solve the equation. Round to two decimal places.3x = 13
A. 2.33
B. 0.43
C. 1.47
D. 4.33
Answer: A
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Solve the problem.Let (a, b) and (c, d) be two points in the first quadrant, and let ? be the angle between the line segment connecting (a, b) with the origin and the line segment connecting (c, d) with the origin. It can be shown thatcos ? = 
.Find ? if 
and 
style="vertical-align: -4.0px;" /> Give your answer in degrees rounded to the nearest hundredth. A. 111.50° B. 55.68° C. 40.43° D. 78.62°
Write the number in scientific notation.4,700,000
A. 4.7 × 107 B. 4.7 × 10-6 C. 4.7 × 106 D. 4.7 × 10-7
Solve the problem.When the temperature stays the same, the volume of a gas is inversely proportional to the pressure of the gas. If a balloon is filled with 180 cubic inches of a gas at a pressure of 14 pounds per square inch, find the new pressure of the gas if the volume is decreased to 45 cubic inches.
A. 52 psi
B. 56 psi
C. 
psi
D. 42 psi
Find the dot product, u ? v, for the given vectors.u = 
, v = 
A. 146 B. -162 C. -87 D. -153