What is the perimeter of this triangle? 50 yd. 300 yd?​

What are the soultion(s) to the quadratic equation 40- x^2=0

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.

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.