Try this suggested solution, note, 'D' means the region bounded by the triangle according to the condition. It consists of 6 steps.
Answers are underlined with red colour.
Answer:
$62.40
Step-by-step explanation:
7 hours of work: $52.50
1 hour of work:
$52.50 / 7 = $7.5
$7.5 per hour
If Ryan's rate increased by 4%, what would he earn per hour?
$7.5 * 1.04 = $7.8
New hourly wage: $7.8 per hour
For 8 hours of work:
$7.8 * 8 = $62.4 = $62.40
Answer: $62.40
Find the mean, median, mode, and range 87,85,81,91,94,96,75,94,80,94
Brrunno [24]
87,85,81,91,94,96,75,94,80,94
The mean is 87.7
The median is 89
The mode is 94
The range is 21
(a) 
since 13 is prime.
(b) 
, and there are 81/3 = 27 multiples of 3 between 1 and 81, which leaves 81 - 27 = 54 numbers between 1 and 81 that are coprime to 81, so 
.
(c) 
; there are 50 multiples of 2, and 20 multiples of 5, between 1 and 100; 10 of these are counted twice (the multiples of 2*5=10), so a total of 50 + 20 - 10 = 60 distinct numbers not coprime to 100, leaving us with 
.
(d) 
; there are 51 multiples of 2, 34 multiples of 3, and 6 multiples of 17, between 1 and 102. Among these, we double-count 17 multiples of 2*3=6, 3 multiples of 2*17=34, and 2 multiples of 3*17=51; we also triple-count 1 number, 2*3*17=102. There are then 51 + 34 + 6 - (17 + 3 + 2) + 1 = 70 numbers between 1 and 102 that are not coprime to 102, and so 
.
