Figure abcd is a rhombus. find the value of x

1. what is the formula for finding the vertical distance between two points on a coordinate plane?

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

The average human heart beats 1.15 \cdot 10^51.15⋅10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65⋅10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.