A four by four grid of unit squares contains squares of various sizes (1 by 1 through 4 by 4), each of which are formed entirely from squares in the grid. In each of the 16 unit squares, write the number of squares that contain it. For instance, the middle numbers in the top row are 6s because they are each contained in one $1 \times 1$ square, two $2 \times 2$, two $3 \times 3$, and the one $4 \times 4$. What is the sum of all sixteen numbers written in this grid

the answer to your question is c.)   volcanoes built the mountains and earthquakes tore them down.

step-by-step explanation:

step-by-step explanation:

20-2= what

43

step-by-step explanation:

not sure if this is supposed to be a trick question. 43 is the only one that makes any sense.

in counting the number of heads in 4 coin flips, the probability that we get exactly one head is the probability that we get anyone of the following 4 outcomes: httt, thtt, ttht, or ttth. each has probability 1/16, so the probability to get exactly one head in 4 flips is 1/16 + 1/16 + 1/16 + 1/16 = 4/16 = 1/4.