I'm pretty sure you just answered your own question, (no hate), but I'm going to take a guess and say 2 hours??
D. f(x)= x*-9x^o+2x^2-4x+10
Sound or vibration wave that is conducted
Answer:
249 centimeters squared
Step-by-step Explanation:
The area of the rectangle: l x w, where l is the length and w is the width.
= 15.5 x 18
= 279
Area of the smaller rectangle: l x w, where l is the length and w is the width.
= 4 x 7.5
= 30
We do not need this 30.
Area of the shaded region:
= 279 - 30
= 249 cm²
