Answer:
![1998 + 5\sqrt{30}](https://tex.z-dn.net/?f=1998%20%2B%205%5Csqrt%7B30%7D)
Step-by-step explanation:
Set up the equation:
Since C(t) gives the number of cars purchased in the t-th year after 1998, then make the number of cars equal to 15 000 and solve for t - the year:
20t^2 = 15000
t^2 = 750
t = ![\sqrt{750} = \sqrt{10} \cdot \sqrt{25} \cdot \sqrt{3} = 5\sqrt{30}](https://tex.z-dn.net/?f=%5Csqrt%7B750%7D%20%3D%20%5Csqrt%7B10%7D%20%5Ccdot%20%5Csqrt%7B25%7D%20%5Ccdot%20%5Csqrt%7B3%7D%20%3D%205%5Csqrt%7B30%7D)
The year will be simply 1998 + 5 \sqrt{30}
Yes you are correct
60 * 360 / 40 = 540
Answer:
it is D
Step-by-step explanation:
Im not sure but I think the correct answers are:
3. B
4. A