What does not equal to 47 meters

What is the explicit formula for this sequence? -7, -4, -1, 2, a.) an = 8 + (b - 1)3 b.) an = -7 + (n - 1)3 c.) an = 3 + (n -1) (-7) d.) an = -7 + (n - )

Find the values of the variables in the kite

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.