For the vector a = ya, + 5a 2. express a in spherical coordinates, both amplitudes and directions. factor the expression and group the like unit vector terms. a. b. for the point p,= (x, yb , 2b ) ( 4,0,0), what are the corresponding spherical coordinates ph (r, p.b)? using your spherical expression for a from (a) and spherical coordinates for p from (b), evaluate the value for a (should be expressed using spherical unit vectors). d. for the point pa = (xa, ya, za) = (3,3,0), what are the corresponding spherical coordinates pa (ra. 0a.9a)? using your spherical expression for a from (a) and spherical coordinates for pa from (d), evaluate the value for a (should be expressed using spherical unit vectors) c.

Explain the difference between each pair of concepts. a. frequency and relative frequency b. percentage and relative frequency a. select the correct choice below. a. frequency is the total number of observations in a data set. relative frequency is the number of times a particular distinct value occurs. b. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of a value to the total number of observations. c. frequency is the total number of observations in a data set. relative frequency is the ratio of the number of times a particular distinct value occurs to the frequency. d. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of two different values.

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

The graph represents the distance a car travels over time while on the highway. which statement about the car's trip is accurate? a) the car does not move over time. b) the car travels at a constant velocity. c) the car's velocity increases constantly over time. d) the car's velocity decreases constantly over time.