Answer: $83.95
Step-by-step explanation:
Hope this helps!
Answer:
B
Step-by-step explanation:
2/3 ÷ 1/6
=2/3 × 6/1
sorry if I got it wrong
Answer: Option B, i.e.,
Option C, i.e., .
Step-by-step explanation:
It is given that formula for the volume V of a cylinder is
We need to find the formula for h.
Divide both sides by .
Therefore, the required formula for height is . Hence option B is correct.
If volume is 36π cm³ and base with a radius of 3 cm, then height of the cylinder is
Therefore, the height of a cylinder is 4 cm. Hence option C is correct.
Differentiate
y = (r² – 9r) · eʳ
with respect to r.
As y is a product of two functions, then use the product rule:
dy d
—— = —— [ (r² – 9r) · eʳ ]
dr dr
dy d d
—— = —— (r² – 9r) · eʳ + (r² – 9r) · —— (eʳ)
dr dr dr
• The derivative of r² – 9r is 2r – 9;
• The derivative of eʳ is eʳ.
Therefore,
dy
—— = (2r – 9) · eʳ + (r² – 9r) · eʳ
dr
dy
—— = [ (2r – 9) + (r² – 9r) ] · eʳ
dr
dy
—— = (r² – 7r – 9) · eʳ <——— this is the answer.
dr
I hope this helps. =)
Answer:
-2
Step-by-step explanation: