A) Use the rationalized expression from part a. to calculate the time in seconds that a cliff diver is in free fall. Assume the acceleration due to gravity, a, is –9.81 m/s and the dive distance, d, is –35 m. The negative numbers indicate the direction is downward. Round the answer to two decimal places. Use the formula to calculate the velocity of the diver in km/h when she or he hits the water. Round the answer to one decimal place.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

there is nothing below so i cannot

step-by-step explanation:

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).