Use the formula (new price-old price) / old price
32-40=-8
-8/40=-20%
the percent difference is 20%
the negative means it was a markdown
Answer:
Between
1
and
50
, we have following numbers as composite.
{
4
,
6
,
8
,
9
,
10
,
12
,
14
,
15
,
16
,
18
,
20
,
21
,
22
,
24
,
25
,
26
,
27
,
28
,
30
,
32
,
33
,
34
,
35
,
36
,
38
,
39
,
40
,
42
,
44
,
45
,
46
,
48
,
49
}
Total
33
composite numbers.
Step-by-step explanation:
Composite numbers are those which have
3
or more factors:
Prime numbers are those which have exactly
2
factors:
There are more composite numbers than prime numbers, (can you explain why this is so?)
So it will be easier to count the prime numbers and subtract them.
There are
50
numbers FROM
1
to
50
Therefore there are
48
numbers BETWEEN
1
and
50
. which are excluded.
There are
15
prime numbers less than
50
, which are:
2
,
.
3
,
.
5
,
.
7
,
.
11
,
.
13
,
.
17
,
.
19
,
.
23
,
.
29
,
.
31
,
.
37
,
.
41
,
.
43
,
.
47
Therefore there are
48
−
15
=
33
composite numbers between
1
and
50
.
Answer:
The corresponding angles are congruent and the corresponding sides are proportional
Step-by-step explanation:
we know that
If two figures are similar, then the ratio of its corresponding sides is equal and its corresponding angles are congruent
therefore
The corresponding angles are congruent and the corresponding sides are proportional