Answer:
multiply length time width
A pile of CD is 40 centimeters high
each CD is 8 millimeters
1 centimeter = 10 millimeters
40(10) = 400 millimeters high
400/8 = 50
50 CD in alll
hope this helps
Answer:
Second option is the correct choice.
Step-by-step explanation:

Regards: Umer
Answer:
Required Expression : 7·(s + d) - 25
Step-by-step explanation :
Cost of each plant both buys = $7
No. of plants Stephanie wants to buy = s
Total cost of plants bought by Stephanie = 7·s
No. of plants Diego wants to buy = d
Total cost of plants bought by Diego = 7·d
Total cost = 7·s + 7·d
= 7·(s + d)
Discount applied through coupon = $25
So, Total cost of all their plants with discount = 7·(s + d) - 25