Answer:
10,000
Step-by-step explanation:
There are 10,000 possible combinations that the digits 0-9 can be arranged into to form a four-digit code.
Answer:
<h3>4.1 x 10^5</h3>
Step-by-step explanation:
10^5 = 100,000 x 4.1 = 410,000
<h3>Hey there! </h3><h3>"The sum of twelve times p and d" </h3><h3>Firstly, you could pull out your key terms for better understanding of the expression</h3><h3>Here's your key terms </h3>
- Sum
- (Of) twelve
- Times
- P and D
<h3>Let's find out what each term mean for setting up your problem , easier </h3>
& 
& 
(since they are <em><u>unknown numbers</u></em>)
SO, this means that your answer SHOULD look like this: 
Good luck on your assignment and enjoy your day!
~
Which ones? which months?
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. =)
