Answer:
11.1d + 3.2h - 15
Step-by-step explanation:
Answer:
d
Step-by-step explanation:
The surface area of a cylindrical can is equal to the sum of the area of two circles and the body of the cylinder: 2πr2 + 2πrh. volume is equal to π<span>r2h.
V = </span>π<span>r2h = 128 pi
r2h = 128
h = 128/r2
A = </span><span>2πr2 + 2πrh
</span>A = 2πr2 + 2πr*(<span>128/r2)
</span>A = 2πr2 + 256 <span>π / r
</span><span>
the optimum dimensions is determined by taking the first derivative and equating to zero.
dA = 4 </span>πr - 256 <span>π /r2 = 0
r = 4 cm
h = 8 cm
</span><span>
</span>
Answer:
2.25 feet
31.5 feet
Step-by-step explanation:
Given that the person travels 9 feet every 4 seconds, it means that in one second, the distance walked
= 9/4
= 2.25 feet
If the person walks 2.25 feet in a second then in 14 seconds, the distance walked
= 2.25*14/1
= 31.5 feet
