Area is height time width, or in this case, 3(2x^2+3x+5), which is 6x^2+9x+15.
Replace the x with 2: f(2)=2*2+7=4+7=11
replace the x with 7: f(7)=2*7+7=14+7=21
Answer:8.9
Step-by-step explanation:
192/43 is about 4.46
4.46*2 is about 8.9
After an hour (4pm to 5pm) the temperature drops 18e⁻⁰˙⁶=9.9℉, so the temperature after an hour will be 68-9.9=58.1℉.
(The change -18e⁻⁰˙⁶ is negative indicating a drop in temperature.)
