Πr2/2 for a half circle Half circle: 1.5 in
1 answer:
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This question is incomplete, However, it can be found in search engines and here is complete question :
Leslie is a biologist. She is going to randomly select one animal from her lab to study. There are 5 salamanders, 3 crayfish, and 12 minnows in her lab. What is P{salamanders}.
Answer:
0.25 or 25%
Step-by-step explanation:
Since there are number of salamanders = 5
number of crayfish = 3
number of minnows = 12
total number of animals n = 5 + 3 + 12 = 20
She wants to randomly select an animal and check if it is Salamander or not.
=
=
= 0.25 or 25%
Answer:
3225
Step-by-step explanation:
The sum to n terms of an arithmetic sequence is
=
[ 2a + (n - 1)d ]
where a is the first term and d the common difference
here a = 6 and
d = 13 - 6 = 20 - 13 = 7, hence
=
[ (2 × 6) + (29 × 7) ]
= 15(12 + 203) = 15 × 215 = 3225