Answer:
The height of the baseball after 3.5 seconds is 31 feet.
Explanation:
Consider the provided expression.
The height of a baseball, in feet, is represented by this expression, where t is time in seconds.
![h=-16t^2+64t+3](https://img.qammunity.org/2020/formulas/mathematics/middle-school/x08kpz34hxqcsavcaxpvzixmbxhdtqayhe.png)
To find the height of the baseball after 3.5 seconds, substitute the value of t = 3.5 in above expression
![h=-16(3.5)^2+64(3.5)+3](https://img.qammunity.org/2020/formulas/mathematics/middle-school/l2rt685bhjbsv21492cg29o2f08gjaou54.png)
![h=-16(12.25)+224+3](https://img.qammunity.org/2020/formulas/mathematics/middle-school/aese6ophbn1l17zfw4ffrfciygroqdqrjr.png)
![h=-196+227](https://img.qammunity.org/2020/formulas/mathematics/middle-school/mo3h2l0b2q5s000mvxg5ylr7n8hwi25y4x.png)
![h=31](https://img.qammunity.org/2020/formulas/mathematics/middle-school/jwqumq1fnocwkcw9owhk9j2bckh22wbtdt.png)
Hence, the height of the baseball after 3.5 seconds is 31 feet.