Help pls Which expression is equivalent to $45\ +\ 27$ ?

A $9\left(5\ \times\ 3\right)$

B $9\left(5\ +\ 3\right)$

C $\left(9\ \times\ 5\right)\ \times\ \left(9\ \times\ 3\right)$

D $\left(9\ +\ 5\right)\ \times\ \left(9\ +\ 3\right)$

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

9.4.34  question   to estimate the height of a stone  figure, an observer holds a small square up to her eyes and walks backward from the figure. she stops when the bottom of the figure aligns with the bottom edge of the  square, and when the top of the figure aligns with the top edge of the square. her eye level is 1.811.81 m from the ground. she is 3.703.70 m from the figure. what is the height of the figure to the nearest hundredth of a  meter?

The ratio of the perimeters of two similar triangles is 4: 3. what are the areas of these triangles if the sum of their areas is 130cm2?