If 85 pounds of seed are needed to plant a 10-acre field, then each pound can cover
![(10)/(85)\text{acres per pound.}](https://img.qammunity.org/2023/formulas/mathematics/college/8ogmhktng7p5yg34qmu4tq5tvgbybbk8lq.png)
Computing the above division, we get:
![0.12\text{ acres per pound.}](https://img.qammunity.org/2023/formulas/mathematics/college/y2dssgwdk1hnnsx129rawnwgmalfcyolql.png)
Now, in the second problem, the rent for 3 hours is $10, therefore, the cost per hour is:
![(10)/(3)\text{dollars per hour.}](https://img.qammunity.org/2023/formulas/mathematics/college/d43hc1qwl90ab4d79tt2lna4olysg624k0.png)
The decimal form of the above solution is:
![3.33\text{ dollars per hour.}](https://img.qammunity.org/2023/formulas/mathematics/college/jagl630g4wlqveiwu327rzgmhbuo56u0py.png)
Answer:
a)
![0.12\text{ acres.}](https://img.qammunity.org/2023/formulas/mathematics/college/ccaxt8i1j5i7ncl0z1xt5267xu86y5s1tj.png)
b)
![3.33\text{ dollars per hour.}](https://img.qammunity.org/2023/formulas/mathematics/college/jagl630g4wlqveiwu327rzgmhbuo56u0py.png)