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natali 33 [55]
3 years ago
14

How many ways can a librarian arrange 15 books on a top shelf if she has 20 books from which to pick?

Mathematics
2 answers:
Jlenok [28]3 years ago
8 0
Use the permutation formula
nPr = (n!)/((n-r)!)
20P15 = (20!)/((20-15)!)
20P15 = (20!)/(5!)

The final answer is choice A

Inga [223]3 years ago
8 0
The correct answer is A turned this in got a 100 hoped this helped ya.
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Claire has invested $10,000 in an 18-month CD that pays 6.25%. How much interest will Claire receive at maturity?
Vikki [24]

Answer:

the interest received is $957.03

Step-by-step explanation:

Given that

The invested amount is $10,000

There is 18 months

And, the interest rate is 6.25%

= (($10,000 × (1 + 6.25% ) × 0.0625  × 6 months ÷ 12 months)) + ($10,000 × 6.25%)

= $332.03 + $625

= $957.03

Hence, the interest received is $957.03

4 0
3 years ago
Which graph represents the solution to this inequality? -1/4(12x+8)<2x+11​
bekas [8.4K]

Answer:

C

Step-by-step explanation:

3 0
3 years ago
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When using the vertical line test, if the vertical line hits the line in more than 1 place it is considered a function.
d1i1m1o1n [39]

Answer:

false

Step-by-step explanation:

If the vertical line hits more than 1 point it is not a function because the x value cannot repeat in order for it to be a function

4 0
3 years ago
Read 2 more answers
City A is 10 miles from city B and 5 miles from city C. Cities A, B, and C form a right triangle at A. A road connects cities B
laila [671]

Answer:

11.18 miles

Step-by-step explanation:

The sides of a right triangle a, b, c are related by the equation

a^2 + b^2 = c^2

where c is the longest side of the triangle

Hence given that A connects B and C directly and forms a right angle at A

5^2 + 10^2 = c^2

Where c is the length of the road

25 + 100 = c^2

125 = c^2

c = 125^1/2

= 11.18 miles

3 0
3 years ago
A chain 5 links long is joined to a chain 7 links long. How many links long is the resulting chain
Anna [14]

12 links long because 5 + 7 = 12

3 0
3 years ago
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