2.2 Use the graph f(x) = -x² + 8x + 20 to determine the values of:
2.2.1
p for which – x² +8x + p = 0 will have equal roots.
2.2.2 b for which - x2 + 8x + 20 = b will have no real roots.​

fahrenheit

step-by-step explanation:

fahrenheit is more precise than celsius. the ambient temperature on most of the inhabited world ranges from -20 degrees fahrenheit to 110 degrees fahrenheit—a 130-degree range. on the celsius scale, that range is from -28.8 degrees to 43.3 degrees—a 72.1-degree range. this means that you can get a more exact measurement of the air temperature using fahrenheit because it uses almost twice the scale.

54.864 meters

step-by-step explanation:

a

step-by-step explanation: