Step 3: 20PR=1,536 Step 4: PR=76.8km

What is valek’s first error
A. Valek did not correctly divide 1,536 by 20 going from step 3 to step 4
B. Valek did not find the correct product of 32 and 48 going from step 2 to step 3
C. Valek should have written the proportion in step 1 as 32/20=PR/48
D. Velek should have written the cross product in step 2 as 32PR=(20)(48)

Select all of the following expressions that are equal to 2.5.

Use the distributive property -7(-2x+u-2)

Find a parametrization for the curve「and determine the work done on a particle moving along γ in r3 through the force field f: r^3--r^3'where f(x,y,z) = (1,-x,z) and (a) im (γ) is the line segment from (0,0,0) to (1,2,1) (b) im (γ) is the polygonal curve with successive vertices (1,0,0), (0,1,1), and (2,2,2) (c) im (γ) is the unit circle in the plane z = 1 with center (0,0,1) beginning and ending at (1,0,1), and starting towards (0,1,1)