I will only do the first-three. You can repost number 4.
Question 1
f(x) = -x^2 + 10x + 4
dy/dx = -2x + 10
Question 2
f(x) = 20 - x + 2
dy/dx = -1
Question 3
f(x) = ex^4 - 2x^2
dy/dx = e•4x^3 + x^4 - 4x
dy/dx = 4ex^3 + x^4 - 4x
It equals 0.00266666667 m / min hope this is what your looking for and if so can you give me brainlist.
Answer:
Step-by-step explanation:
a) about the line y = 3
⇒ 
is the intersection point
So,
b) about the line x = 5
⇒ 
So,
![V = \int\limits^3_0\pi([5-0]^2-[5-y^2/9]^2)\:dy=\pi\int\limits^3_0(25-25+10y^2/9-y^4/81)\:dy=\\\\=\pi(10y^3/27-y^5/405)|^3_0=\pi(10-3/5)=\frac{47}{5} \pi](https://tex.z-dn.net/?f=V%20%3D%20%5Cint%5Climits%5E3_0%5Cpi%28%5B5-0%5D%5E2-%5B5-y%5E2%2F9%5D%5E2%29%5C%3Ady%3D%5Cpi%5Cint%5Climits%5E3_0%2825-25%2B10y%5E2%2F9-y%5E4%2F81%29%5C%3Ady%3D%5C%5C%5C%5C%3D%5Cpi%2810y%5E3%2F27-y%5E5%2F405%29%7C%5E3_0%3D%5Cpi%2810-3%2F5%29%3D%5Cfrac%7B47%7D%7B5%7D%20%5Cpi)
Answer: 10-pound bag for $4.58
Step-by-step explanation:
A store sells potatoes in 5-pound bags for $2.29. To get the amount for a pound bag of potatoe, we divide $2.29 by 5. This will give:
$2.29 / 5 = $0.458
To get the amount equivalent goes thus:
For a 20-pound bag for $8.80, a pound will cost:
$8.80/20 = $0.44
For a 2-pound bag for $1.02, a pound bag will be:
$1.02/2 = $0.51
For a 10-pound bag for $4.58, a pound bag will cost:
$4.58/10 = $0.458
For a 7-pound bag for $3.01, a pound bag will cost:
$3.01/7 = $0.43
From the figures calculated, a 10-pound bag for $4.58 is the same as the amount calculated.
Answer:
9/39
Step-by-step explanation: just took the quiz on ed 2020
