Plz me

simplify this fraction plz?

21

1

Volume of cylinder with a radius of 8cm and height of 25 cm

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2