A lock is using 3 digits from 1 to 7 as its lock combination, the numbers can be repeated. How many different possible lock comb
1 answer:
The question is an illustration of selection (or combination)
The number of lock combination is 343
The given parameters are:
<em /><em> --- the number of digits to select from</em>
<em /><em> --- the number of digits the lock uses</em>
<em />
Because the digits can be repeated, the number of lock combinations is:
So, we have:
Hence, the number of lock combination is 343
Read more about combinations at:
You might be interested in
Answer:
Therefore the friends will have to buy 511 feet of fence (rounding up) or 510 feet of fence ( to the nearest foot).
Step-by-step explanation:
i) perimeter of rectangular yard = 319 feet
ii) perimeter of yard of friends
iii) Therefore the friends will have to buy 511 feet of fence or 510 feet of fence ( to the nearest foot).
The radius of the circle exists approximately 4.95 feet.
<h3>How to estimate the radius of the circle?</h3>Given the area of the square as A = 98 ft²
The side length of the square choice is equivalent to the diameter of the circle.
First, we must obtain the length of the square.
Area of a square
98 = L²
L = √98
L = 9.89 ft
Thus the diameter of the circle exists at 9.89 ft
radius = diameter/2
radius = 9.89/2
radius ≈ 4.95 feet
Therefore the radius of the circle exists approximately 4.95 feet.
To learn more about the radius of circle refer to:
#SPJ9