Determine whether the vectors v and w are orthogonal.v = < -2, 6 >, w = < -10, -5 >
A. Not orthogonal
B. Orthogonal
Answer: A
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Factor the binomial completely.49a3 - 25a
A. a(49a + 1)(a - 25) B. (7a2 + 5)(7a - 5) C. a(7a + 5)(7a - 5) D. a(7a - 5)2
Suppose 100 people counted the number of cars passing an intersection in one hour. Due to error, not all people get the same value. The mean is 75 and the standard deviation is 1. Use the sketch to find how many people report the following. 
Between 74 and 76 cars
A. 50 people B. 34 people C. 84 people D. 68 people
Solve the problem.The function f(x) = 900(0.5)x/70 models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. Find the amount of radioactive material in the vault after 
Round to the nearest whole number.
A. 707 pounds B. 303 pounds C. 286 pounds D. 579 pounds
A 10-pound weight is lying on a sit-up bench at the gym. If the bench is inclined at an angle of 
, there are three forces acting on the weight. N is called the normal force and it acts in the direction perpendicular to the bench. F is the force due to friction that holds the weight on the bench. If the weight does not move, then the sum of these three forces is 0.
?
?
Find the magnitude of N and the magnitude of F. Apply the rules regarding the use of significant digits when determining your answers.
?
__________ lb
?
__________ lb
What will be an ideal response?