Dina encoded a secret phrase using matrix multiplication. she multiplied the clear text code for each letter by the matrix (see image) to get a matrix that represents the encoded text. by which matrix does dina multiply the encoded text to get the matrix for the clear text code?

4. find the geometric mean of 4 and 12. 24 8

3-12. write each answer with a reasonable number of figures. find the absolute uncertainty and percent relative uncertainty for each answer. (a) [12.41 (±0.09) + 4.16 (±0.01)] x 7.068 2 (±0.000 4) =? (b) [3.26 (±0.10) x 8.47 (±0.05)] - 0.18 (±0.06) =? (c) 6.843 (±0.008) x 104 + [2.09 (±0.04)- 1.63 (±0.01)] =?

If the dimensions of a rectangular prism are 5 ft x 3.5 ft x 2 ſt, what is the surface area?