3+4 = 7
so
21 / 7 3
3 x 3 = 9
3 x 4 = 12
answer
£21 in ratio 3:4 is £9:£12
Answer:
42
Step-by-step explanation:
Answer:
5/8 ÷ 4 = 5/32
Step-by-step explanation:
Percentage of cats


**cross multiply 12 and 100 which is 1200
**divide 35 into 1200
the answer is 34.3% when rounded
percentage of snakes

**cross multiply 3 and 100 which is 300
<span>**divide 35 into 300</span>
<span>

</span>the answer is 8.57%
Answer:
$200
Step-by-step explanation:
Here is the full question
You can upgrade lighting at your factory to LED bulbs that cost $6.95 each and last an average of 5 years. It costs $3 in labor to change a bulb. Over a 10-year period, about how much will it cost per year to install LED bulbs in 100 lamps and change the bulbs when they burn out?
in 10 years, the bulbs would be changed twice
Total cost incurred per bulb in 10 years = (6.95 + $3) x 2 = $19.90
Since there are 100 bulbs, total cost incurred would be - $19.90 x 100 = $1990
Cost per year = $1990 / (6.95 + $3) = $200